| Name | Regular Rating | Quick Rating | USCF ID # | USCF Expiration | |
|---|---|---|---|---|---|
| O Dea,Jeremiah Jo | 32521560 | ||||
| O Malley,Andrew | 872 | 931 | 14253217 | 9/30/2014 | |
| O'Boyle,James J | 1596 | 11384471 | |||
| O'Breque,Adam Rei | 260/10 | 256/10 | 14131754 | 2/28/2010 | |
| O'Breque,Ethan Ma | 175/08 | 175/08 | 14131760 | 2/28/2010 | |
| O'Brien,Andrew M | 1230 | 953 | 12935222 | 11/30/2010 | |
| O'Brien,Anthony J | 1279 | 12560974 | |||
| O'Brien,Cadence | 16674710 | 3/31/2019 | |||
| O'Brien,Caitlin | 293/04 | 12836737 | |||
| O'Brien,Conor | 1161 | 866 | 12799844 | ||
| O'Brien,Corey | 13853496 | 1/31/2009 | |||
| O'Brien,Daniel Ga | 1891 | 1872 | 12914292 | 11/30/2013 | |
| O'Brien,Dennis J | 1373/07 | 12441495 | 9/30/2008 | ||
| O'Brien,Devin | 754/05 | 778/05 | 14768032 | 11/30/2012 | |
| O'Brien,Frederick | 1301 | 12450944 | |||
| O'Brien,Gavin M | 101/05 | 101/05 | 17328628 | 3/31/2024 | |
| O'Brien,Inga | 31872680 | 5/31/2025 | |||
| O'Brien,John A | 1182 | 12520432 | |||
| O'Brien,John J | 12571519 | ||||
| O'Brien,Matthew J | 2318 | 2194 | 13377996 | 8/31/2225 | |
| O'Brien,Matthew P | 843 | 807/18 | 12935221 | 5/31/2007 | |
| O'Brien,Sean | 12440929 | ||||
| O'Brien,Sean P | 225/04 | 12667319 | |||
| O'Brien,Shawn P | 1509 | 12551505 | |||
| O'Brien,Tegan Ryl | 31372507 | ||||
| O'Brien,William P | 1289 | 12402201 | |||
| O'Byrne,Zachary | 174/18 | 174/18 | 16977892 | 2/29/2020 | |
| O'Connell,Charlot | 304/04 | 306/04 | 30622766 | 6/30/2023 | |
| O'Connell,Dale R | 1940 | 12452372 | |||
| O'Connell,David J | 1483 | 12348870 | |||
| O'Connell,Edgar | 629 | 630 | 13701566 | 5/31/2013 | |
| O'Connell,Grace | 895/04 | 896/04 | 30622759 | 6/30/2023 | |
| O'Connell,Grace E | 30626857 | ||||
| O'Connell,James | 1497 | 11123864 | |||
| O'Connell,Kerry | 400/08 | 12685227 | |||
| O'Connell,Matthew | 1325/06 | 13096595 | 2/28/2006 | ||
| O'Connell,Ralph | 12442885 | ||||
| O'Connell,Ruth A | 877 | 12499280 | |||
| O'Connor,Aaron | 12685588 | ||||
| O'Connor,Alex | 553/21 | 379/21 | 13016214 | 11/30/2007 | |
| O'Connor,Daniel N | 1508/05 | 12836125 | |||
| O'Connor,Gus | 294 | 262 | 13016241 | 11/30/2005 | |
| O'Connor,Gus Greg | 307/11 | 262/07 | 12843694 | 11/30/2007 | |
| O'Connor,James F | 656 | 12673778 | |||
| O'Connor,John | 12578817 | ||||
| O'Connor,John | 12749886 | ||||
| O'Connor,Joseph K | 936 | 1035 | 12612485 | ||
| O'Connor,Kieran | 286/12 | 204/05 | 13915191 | 3/31/2009 | |
| O'Connor,Michael | 764/20 | 704/10 | 15481217 | 1/31/2025 | |
| O'Connor,Patrick | 12860784 | ||||
| O'Connor,Richard | 1045 | 12533605 | |||
| O'Connor,Robert | 957/10 | 493/05 | 15481202 | 3/31/2018 | |
| O'Connor,Rory | 972/06 | 842/06 | 31979711 | 8/31/2026 | |
| O'Connor,Steven J | 1408 | 1486 | 10141770 | 9/30/2028 | |
| O'Connor,William | 1382 | 12471608 | |||
| O'Dell,Allen R | 1550 | 12479525 | |||
| O'Dell,Jody | 12706787 | ||||
| O'Donnell,Bobby | 491/04 | 12851924 | |||
| O'Donnell,Brett | 440/04 | 450/08 | 13036223 | 12/31/2005 | |
| O'Donnell,Brian J | 1000 | 20031841 | |||
| O'Donnell,Conor P | 12756262 | ||||
| O'Donnell,David | 783/04 | 779/04 | 13192997 | 5/31/2006 | |
| O'Donnell,Devin J | 12773302 | ||||
| O'Donnell,J J | 1877 | 12396251 | 4/30/2022 | ||
| O'Donnell,Kristen | 1427 | 20031811 | |||
| O'Donnell,Michael | 797/04 | 21000752 | |||
| O'Donnell,Roger P | 10157854 | ||||
| O'Donnell,Sarah | 12539672 | ||||
| O'Donnell,Sean | 562/05 | 12649220 | |||
| O'Donnell,Tim E | 1424 | 12564952 | |||
| O'Donovan,Kyle | 739 | 12692057 | |||
| O'Dunne,Rowan | 30446239 | 2/28/2023 | |||
| O'Dunne,Ruby | 30446199 | 2/28/2023 | |||
| O'Gara,Michael | 1737 | 1508 | 15392184 | 3/31/2026 | |
| O'Halloran,Terenc | 1257 | 1294/13 | 12643095 | 9/30/2026 | |
| O'Hanlon,Bernard | 1308/05 | 12852455 | |||
| O'Hara,John J | 12651855 | ||||
| O'Hara,Michael J | 12455574 | ||||
| O'Hara,Scott | 417/17 | 272/12 | 13704388 | 9/30/2009 | |
| O'Hara,Tommy | 245/08 | 232/08 | 14596396 | 2/28/2013 | |
| O'Kane,Jason M | 718/04 | 21001657 | |||
| O'Karma,Andrew | 410/19 | 409/19 | 16840246 | 1/31/2021 | |
| O'Keefe,Sean T | 694/11 | 12807534 | |||
| O'Lear,Michael D | 1214 | 12559720 | |||
| O'Leary,Davis | 107/05 | 107/05 | 14181867 | 3/31/2010 | |
| O'Leary,Devin | 849/16 | 12678035 | |||
| O'Leary,Gary | 12446230 | ||||
| O'Leary,Graeme | 275/04 | 276/04 | 14320352 | 12/31/2010 | |
| O'Leary,John S | 1444 | 1495/20 | 12417226 | 1/31/2016 | |
| O'Leary,Patrick | 12707168 | ||||
| O'Leary,Reese | 610/04 | 610/04 | 14320367 | 12/31/2010 | |
| O'Leary,Ryan | 1005 | 12623929 | |||
| O'Mahoney,Sean | 732 | 20083928 | |||
| O'Malley,Brian M | 992/04 | 21000700 | |||
| O'Mara,Robert S | 1568/14 | 12762899 | |||
| O'Meara,James M | 501/05 | 454/06 | 12930146 | ||
| O'Neal-Odom,Arche | 335/20 | 334/20 | 13639921 | 2/29/2008 | |
| O'Neil,Bryan Atwo | 1114/17 | 14994385 | 11/30/2015 | ||
| O'Neil,Wesley A | 752/05 | 12831121 | |||
| O'Neill,Dylan D | 262/04 | 247/04 | 14252805 | 10/31/2011 | |
| O'Neill,Jake Thom | 356/07 | 339/07 | 14257116 | 10/31/2010 | |
| O'Neill,Kevin J. | 32624771 | 10/31/2027 | |||
| O'Neill,Lennon | 681 | 705 | 16881905 | 11/30/2023 | |
| O'Neill,Lennon | 30059463 | ||||
| O'Neill,Lucas | 330/19 | 324/19 | 16866956 | 11/30/2019 | |
| O'Neill,Mateo Bra | 294/16 | 300/13 | 31935219 | 7/31/2026 | |
| O'Neill,Patrick | 20042478 | ||||
| O'Neill,Reils | 13564136 | 11/30/2007 | |||
| O'Neill,Ryan | 103/04 | 103/04 | 16958892 | 2/29/2020 | |
| O'Neill,Sean B | 12543888 | ||||
| O'Neill,Timothy N | 1355/08 | 1355/08 | 12891222 | ||
| O'Neill,William A | 1335 | 12387770 | |||
| O'Neill,William A | 1348 | 12517210 | |||
| O'Regan,Kenneth | 825/05 | 801/05 | 13684755 | ||
| O'Reilly,Arnie | 335/04 | 335/04 | 32660570 | 11/30/2026 | |
| O'Reilly,Arnie | 268/04 | 268/04 | 32860046 | 2/28/2027 | |
| O'Rourke,Brendan | 15364971 | 2/28/2015 | |||
| O'Rourke,Gerard J | 100/07 | 13694087 | 2/28/2015 | ||
| O'Rourke,Gerard M | 1902 | 12444974 | 2/28/2015 | ||
| O'Rourke,James | 1329/17 | 12612832 | |||
| O'Rourke,James R | 1603 | 12449052 | |||
| O'Rourke,John | 881/12 | 12898837 | |||
| O'Rourke,John Jos | 15364965 | 2/28/2015 | |||
| O'Rourke,Lily Mar | 32421144 | ||||
| O'Rourke,Nathan D | 910/07 | 15696718 | 3/31/2016 | ||
| O'Rourke,Patrick | 15364986 | 2/28/2015 | |||
| O'Rourke,William | 850/09 | 15364950 | 6/30/2022 | ||
| O'Shea,Justin Luk | 32803045 | 1/31/2027 | |||
| O'Shea,Tim | 341/06 | 12716629 | |||
| O'Sullivan,Brian | 947/04 | 12640752 | |||
| O'Sullivan,Dan | 1026 | 12493458 | |||
| O'Sullivan,Fergal | 807/09 | 15701066 | 3/31/2016 | ||
| O'Toole,August | 107/04 | 107/04 | 16295626 | 2/28/2018 | |
| O'Toole,Sean P | 349/04 | 331/08 | 12890071 | ||
| O'Toole,Thomas J | 105/04 | 105/04 | 14630518 | 3/31/2012 | |
| O,Jun Kwon | 1440 | 12475979 | |||
| O,Jun Young | 1349 | 12442138 | |||
| O,Nathaniel Hajin | 1308 | 1107/13 | 16820662 | 11/30/2021 | |
| O?Brien,Dawson | 515 | 501 | 32478481 | 6/30/2026 | |
| O?Neill,Jack Mitc | 31157923 | 3/31/2024 | |||
| O?Neill,Rich | 235/22 | 226/22 | 32227593 | 1/31/2026 | |
| Oakman,Thernell | 13407667 | ||||
| Oarshan,Sameer | 16844570 | 11/30/2019 | |||
| Oaster,Brian | 1312 | 12413242 | |||
| Oatlhotse,Provide | 2379/22 | 2334/14 | 15820215 | ||
| Obenour,Jill | 755/04 | 13003491 | 11/30/2005 | ||
| Ober,Brad | 1380/04 | 12727498 | |||
| Ober,Eric | 1039 | 12501066 | |||
| Ober,Ivan G | 1585 | 11459412 | |||
| Ober,Karl | 12580221 | ||||
| Ober,Nathan | 1094 | 12526936 | |||
| Oberdiek,Lucas | 108/05 | 107/05 | 14409466 | 3/31/2011 | |
| Oberdorff,Barry | 12545736 | ||||
| Oberholtzer,Bryan | 1061/05 | 16649716 | 3/31/2019 | ||
| Oberholtzer,Chris | 593/11 | 665/11 | 12778916 | ||
| Oberholtzer,Jeffr | 400/12 | 12778915 | |||
| Oberholtzer,Leon | 884/04 | 20103514 | |||
| Oberholtzer,Neal | 1814 | 1893 | 10157251 | 12/31/2099 | |
| Oberholtzer,Steph | 1077 | 12549918 | |||
| Oberholtzer-Hess, | 734/05 | 16990164 | 3/31/2020 | ||
| Oberholtzer-Hess, | 1022/10 | 16990342 | 3/31/2021 | ||
| Oberman,J David | 12625500 | ||||
| Obernauer,Alexis | 12737697 | ||||
| Obert-Thorn,Stacy | 1213 | 20021389 | |||
| Oblak,Malcolm | 17352765 | 6/30/2021 | |||
| Obod,Keith | 126/08 | 124/08 | 14557633 | 12/31/2011 | |
| Obod,Neil | 331/14 | 317/14 | 14163374 | 12/31/2011 | |
| Obrien,Aurora | 103/04 | 103/04 | 17214003 | 11/30/2020 | |
| Obrien,Evelyn | 103/04 | 103/04 | 17214018 | 11/30/2020 | |
| Obrien,Tristan | 107/05 | 107/05 | 17328613 | 3/31/2021 | |
| Obrien,Zachary | 136/13 | 120/13 | 30026251 | 7/31/2021 | |
| Obringer,Mark P | 12498221 | ||||
| Obulareddy,Harina | 31020234 | 6/30/2024 | |||
| Obusek,Ernest J | 12546922 | ||||
| Ocasio,Frannette | 100/04 | 100/04 | 16512605 | 11/30/2018 | |
| Ocasio,Isaac Alex | 15957436 | 2/28/2017 | |||
| Ocasio,Luis E | 1413 | 12489833 | |||
| Ochis,Eric | 618/08 | 615/08 | 16385057 | 5/31/2018 | |
| Ochis,Lucas | 362/07 | 362/07 | 16385021 | 5/31/2018 | |
| Ochmanowicz,Antho | 673/16 | 786/24 | 13666351 | 4/30/2012 | |
| Ochmanowicz,David | 820 | 12640762 | |||
| Ochoa,Carlos A | 12536798 | ||||
| Ochoa,Gabriel | 597 | 590 | 16134040 | 10/31/2017 | |
| Ochsner,Alexander | 14290942 | 11/30/2010 | |||
| Ochwo,Tyler | 105/04 | 105/04 | 31778075 | 3/31/2025 | |
| Ockman,Stuart | 1616 | 1591/15 | 10160103 | 12/31/2099 | |
| Oddo,Nicholas L | 12626054 | ||||
| Odell,Andrew | 1300/16 | 12643821 | |||
| Odell,John | 1103/21 | 1016/09 | 13118031 | 5/31/2024 | |
| Odhner,Eldon B | 108/10 | 108/10 | 16611458 | 2/28/2019 | |
| Odom,Steven Ray | 30855920 | 9/30/2026 | |||
| Odoms,Donald | 1466 | 12087440 | |||
| Odoms,Shikeith | 16756596 | 7/31/2019 | |||
| Odonnell,Colin Ra | 935/04 | 882/04 | 31247436 | 5/31/2024 | |
| Odonnell,Graham | 214/08 | 214/08 | 32423248 | 4/30/2026 | |
| Odumosu,Jomiloju | 608/09 | 515/13 | 15253685 | 10/31/2014 | |
| Oestreicher,Jonat | 762 | 741/15 | 12678036 | ||
| Oetinger,Will | 12639219 | ||||
| Oetzel,Clarence | 12429168 | ||||
| Oft,Nicholas M | 459/10 | 12801515 | |||
| Ogagan,Ejiro | 14418103 | ||||
| Ogando,Juan | 1645/04 | 17082405 | 6/30/2021 | ||
| Ogden,Robert C | 687 | 12525139 | |||
| Oglensky,Joseph | 110/14 | 110/14 | 31482084 | 11/30/2025 | |
| Oglesby,Ralph | 12672064 | ||||
| Oglialora,Joseph | 12529816 | ||||
| Ogozaly,Jack | 1381 | 1326 | 15481820 | 8/31/2016 | |
| Ogrodniczek,Nikol | 1087/16 | 1044/16 | 32779644 | 12/31/2026 | |
| Ogunkua,Olubemiga | 12776418 | ||||
| Ogunmola,Olanrewa | 944/05 | 944/05 | 15602558 | 12/31/2015 | |
| Ogunranti,Gbemile | 16193355 | 11/30/2018 | |||
| Oh,Chien C | 1581 | 12494153 | |||
| Oh,Christopher | 310/13 | 311/13 | 15016421 | 11/30/2013 | |
| Oh,Glenn | 243/16 | 552 | 14244036 | 9/30/2012 | |
| Oh,Hanhui | 31306850 | 6/30/2024 | |||
| Oh,Isaac | 610 | 20021390 | |||
| Oh,Joseph | 930/05 | 14620581 | 3/31/2012 | ||
| Oh,Mikael | 1464 | 1245/13 | 31514573 | 3/31/2026 | |
| Oh,Samuel | 1484 | 1011/16 | 30633606 | 3/31/2026 | |
| Ohene,Anim | 32521892 | ||||
| Ohene,Anim | 32521905 | 7/31/2026 | |||
| Ohkawa,Shingo | 1280/15 | 1269 | 21001742 | ||
| Ohkawa,Taku | 1236/11 | 12699129 | |||
| Ohl,Clifford O | 1444 | 20062184 | |||
| Ohl,Raymond G | 1059 | 20062148 | |||
| Ohler,Joe | 1900 | 10180660 | |||
| Ohliger,Michael A | 1134 | 20013100 | |||
| Ohms-Winnie,Asher | 100/05 | 100/05 | 13331565 | 1/31/2007 | |
| Ohta,Brian | 12911594 | 9/30/2008 | |||
| Ohta,Peter | 165/06 | 164/06 | 16790111 | 10/31/2021 | |
| Oister,Samuel Tho | 382/04 | 336/04 | 32529753 | 8/31/2026 | |
| Okabayashi,Max | 310/08 | 304/08 | 13219047 | 8/31/2006 | |
| Okada,Shinji | 701 | 714 | 12814420 | ||
| Okamoto,Michael | 12920132 | ||||
| Okel,Travis | 549/04 | 21001780 | |||
| Okhovat,Al | 13730097 | 6/30/2008 | |||
| Okita,Naohiro | 226/11 | 219/11 | 16744697 | 6/30/2019 | |
| Oklin,Bryan | 796/12 | 12627276 | |||
| Okonkwo,Steven | 351/10 | 361/10 | 16508311 | 11/30/2018 | |
| Okruashvili,Ilia | 216/09 | 214/09 | 32188003 | 3/31/2027 | |
| Okutsu,Mati | 657/05 | 578/05 | 30403640 | 12/31/2022 | |
| Olagunju,Shaun | 227/10 | 226/10 | 16883484 | 12/31/2019 | |
| Olah,Camper | 16881891 | 11/30/2019 | |||
| Olaleye,Olayomomi | 352/17 | 329/17 | 30811339 | 9/30/2026 | |
| Olaloye,Jerome | 1519 | 1421/20 | 12596085 | 2/28/2006 | |
| Olander,Ronnie S | 286/05 | 12721369 | |||
| Olbrich,Nathaniel | 453 | 457 | 12855966 | 1/31/2008 | |
| Olbrich,Samantha | 13311687 | 12/31/2006 | |||
| Olbum,Jeremy | 448/22 | 445/22 | 12908838 | ||
| Olbum,Jon H | 1527 | 12909249 | |||
| Olbum,Orly | 100/04 | 100/08 | 12909893 | ||
| Oldak,Daniel | 727 | 728 | 15331181 | 3/31/2016 | |
| Oldaker,Jacob | 659/20 | 671 | 12930147 | 3/31/2006 | |
| Oldershaw,Tristan | 748/06 | 12861251 | |||
| Olear,Michael | 12503963 | 3/31/2012 | |||
| Oleary,Zachary | 1080/09 | 1003/10 | 31763908 | 3/31/2025 | |
| Oleksa,James L | 12445298 | ||||
| Oleksiak,Edward A | 1343 | 12518142 | 12/31/2006 | ||
| Olender,Simon | 1029/04 | 31582093 | 12/31/2024 | ||
| Olenick,Chelsea | 246/04 | 248/04 | 31882690 | 5/31/2025 | |
| Oler,Alonzo | 872 | 12562423 | |||
| Oler,Christopher | 1200 | 16798468 | 2/28/2027 | ||
| Olesk,Michael | 12774393 | ||||
| Oleson,Brandi L | 736/04 | 21000716 | |||
| Oleson,Jack K | 853 | 12667320 | |||
| Oleson,John | 1133/14 | 12901692 | |||
| Olewiler,Richard | 1362 | 12204970 | |||
| Olhanoski,Danae | 636/04 | 20097652 | |||
| Olid-Stafford,Ama | 32560680 | 9/30/2026 | |||
| Olijnyk-Wong,Roma | 301/16 | 301/16 | 16482625 | 11/30/2019 | |
| Olijnyk-Wong,Sara | 114/14 | 114/14 | 16482631 | 11/30/2019 | |
| Olimjonova,Anisa | 30519240 | 3/31/2023 | |||
| Olinger,David M | 410/12 | 380/12 | 15178033 | 5/31/2014 | |
| Olinger,Gianna | 282/15 | 282/15 | 16047494 | 5/31/2017 | |
| Olinger,Kristin D | 220/04 | 219/04 | 15178048 | 5/31/2014 | |
| Oliphant,Brennon | 955/21 | 938/21 | 16165750 | 11/30/2017 | |
| Oliphant,Jason | 1149/20 | 1143/19 | 20005301 | 12/31/2017 | |
| Oliphant,Keyanna | 14289773 | 11/30/2010 | |||
| Oliva,Carlos A | 1092 | 1042/16 | 12764983 | ||
| Oliva,Cassandra | 389/10 | 388/10 | 13876504 | 1/31/2010 | |
| Oliva,Oscar | 298/19 | 297/19 | 13876484 | 1/31/2010 | |
| Oliveira,Nathan | 173/07 | 173/07 | 32633563 | 10/31/2026 | |
| Oliveira,Patience | 105/04 | 105/04 | 15570896 | 11/30/2015 | |
| Oliver,Amara L | 105/04 | 105/04 | 13759661 | 9/30/2008 | |
| Oliver,David C | 1287 | 12478285 | |||
| Oliver,Douglas T | 1431 | 12442100 | |||
| Oliver,Dylan J | 13067336 | 1/31/2006 | |||
| Oliver,Jamaal | 15609285 | 12/31/2015 | |||
| Oliver,Jamaal | 629/24 | 555/19 | 16371366 | 5/31/2019 | |
| Oliver,Jason Jose | 16528121 | 9/30/2024 | |||
| Oliver,Joseph B | 1156 | 12822620 | |||
| Oliver,Paul | 12538642 | ||||
| Oliver,Richard | 1434 | 12637951 | |||
| Oliver,Robby | 1406 | 12425212 | |||
| Oliver,Ryan D | 218/11 | 220/15 | 12921853 | 2/28/2006 | |
| Oliver,William | 100/04 | 100/04 | 13762465 | 9/30/2008 | |
| Oliveras,Freddie | 12899592 | ||||
| Oliveri,Franco | 12869244 | ||||
| Olivero,Joseph | 1187/04 | 16040140 | 4/30/2017 | ||
| Oliveros,Riccardo | 1364 | 1340/13 | 12578923 | ||
| Olivia,Reiser M | 754/16 | 714/16 | 13480610 | 7/31/2007 | |
| Olivier,Jacques P | 12581391 | ||||
| Olivo,Michael Ant | 14203571 | 4/30/2012 | |||
| Olmsted,Dylan | 897 | 1161 | 14383503 | 10/31/2025 | |
| Olmsted,Joel Maiz | 16371387 | 4/30/2019 | |||
| Olowu,Kayode Dami | 1698 | 1634/15 | 13920651 | 11/30/2018 | |
| Olscheske,Michael | 1375 | 12496453 | |||
| Olsen,Jeffrey | 13590044 | 12/31/2007 | |||
| Olsen,Kevin Harry | 12970653 | 12/31/2014 | |||
| Olsen,Matt | 12656322 | ||||
| Olshanski,Dominic | 741/12 | 12802933 | |||
| Olsommer,Jordan | 567/04 | 12625863 | |||
| Olson,Austin J | 908/22 | 14387230 | 3/31/2013 | ||
| Olson,Conrad | 12458470 | ||||
| Olson,David L | 2003 | 1952 | 12443609 | 12/31/2099 | |
| Olson,Declan | 181/08 | 181/08 | 16893894 | 12/31/2023 | |
| Olson,Gregory A | 1806 | 12532845 | |||
| Olson,Gunnar | 179/07 | 179/07 | 17240303 | 12/31/2020 | |
| Olson,Kamila S | 1097 | 816 | 15327864 | 7/31/2024 | |
| Olson,Kitana S | 1459 | 1121 | 14953590 | 12/31/2024 | |
| Olson,Robert P | 12538345 | ||||
| Olson-Vason,Kathe | 1444 | 1293 | 12926000 | 9/30/2023 | |
| Olsson,Alexander | 526 | 524 | 13598014 | 1/31/2009 | |
| Olsson,Jake W | 426 | 412 | 13727245 | 8/31/2010 | |
| Olsson,Sabine | 148/17 | 148/17 | 13701408 | 4/30/2009 | |
| Olszewski,Chris | 14528066 | 11/30/2011 | |||
| Olszewski,Noah | 105/04 | 105/04 | 17157457 | 10/31/2020 | |
| Olszewski,Sarah | 515/04 | 514/04 | 14320346 | 12/31/2010 | |
| Oltmanns,Alexande | 1023 | 998 | 12721370 | 2/28/2006 | |
| Oltmans,Seth | 510/05 | 503/05 | 16742328 | 6/30/2019 | |
| Oltvai,Kristof Zo | 1012 | 1043 | 14328584 | 1/31/2012 | |
| Olugbale,Kelechi | 522/04 | 31354189 | 7/31/2024 | ||
| Olver,Timothy M | 12474660 | ||||
| Olverson,David S | 20002950 | ||||
| Olyansky,Gregory | 655/20 | 571/16 | 12813773 | ||
| Omalley,Austin | 12662220 | ||||
| Omalley,Quinn | 15447096 | 5/31/2015 | |||
| Omar,Henry | 264/04 | 12843810 | |||
| Omar,Salem | 1502 | 12493029 | |||
| Omarr,Taylor | 12576797 | ||||
| Omebere-Iyari,Ria | 455 | 445 | 31220264 | 5/31/2026 | |
| Omebere-Iyari,Zih | 960 | 1022 | 31203670 | 5/31/2026 | |
| Omecinski,Katelin | 550 | 543 | 13264175 | 12/31/2009 | |
| Omecinski,Kristie | 100/23 | 100/23 | 13264160 | 11/30/2006 | |
| Omelchenko,Igor | 829 | 845 | 12866009 | 3/31/2009 | |
| Omelio,Alexander | 251/04 | 12662046 | |||
| Omens,Andy | 1229 | 12526986 | |||
| Omondi,Alspencer | 30348464 | 11/30/2022 | |||
| Oncley,Lawrence A | 1392 | 10151864 | |||
| Ondrey,Brian | 12821327 | ||||
| Oneil,Daneul | 930/15 | 929/20 | 12902363 | 3/31/2006 | |
| Onesi,Veronica | 244/18 | 250/17 | 12810597 | ||
| Onesky,Contessa | 12566406 | ||||
| Ong,Jay | 734/06 | 12677253 | |||
| Ong,Kah Kien | 1493/10 | 12869692 | |||
| Oniate,Marvin | 1867 | 1564/19 | 12673631 | 6/30/2013 | |
| Onichimowski,Leon | 1245 | 1246/18 | 30297744 | 4/30/2026 | |
| Onichimowski,Leon | 31020701 | ||||
| Onink,Morgan K | 12853389 | ||||
| Onink,Tess M | 12849174 | ||||
| Onorato,Kyle | 20102752 | ||||
| Onosov,Anthon | 12795384 | ||||
| Onraet,Maurice | 12508100 | ||||
| Onus,Selma | 151/12 | 150/12 | 16863448 | 11/30/2019 | |
| Ooi,Chernee | 2176 | 12720476 | |||
| Oommen,Binju | 2028 | 16895451 | 6/30/2022 | ||
| Oos,Ayden | 255/12 | 254/12 | 32658290 | 11/30/2026 | |
| Opaska,Michael | 1900 | 1904 | 12769513 | 2/28/2026 | |
| Openbrier,Terry M | 12585608 | ||||
| Openko,Dominick | 100/05 | 100/05 | 13412866 | 3/31/2007 | |
| Operhall,Benji Al | 519/14 | 493/14 | 14835898 | 2/28/2019 | |
| Opferman,Benjamin | 407/08 | 400/08 | 16384740 | 5/31/2018 | |
| Opioyero,Daryll L | 1277 | 12434953 | |||
| Oplinger,Neal M | 862/13 | 12848366 | |||
| Oplinger,Tony | 1143/09 | 1447/20 | 12686003 | ||
| Oplinger,William | 510/09 | 12853364 | |||
| Opoku-Dakwa,Adjoa | 187/04 | 187/04 | 17112151 | 9/30/2020 | |
| Opoku-Dakwa,Ekow | 1032 | 1036 | 15218031 | 8/31/2023 | |
| Opoku-Dakwa,Kofi | 1025/18 | 1028/18 | 16036823 | 8/31/2023 | |
| Oppenheim,Eliza | 587 | 562 | 12921854 | 2/28/2006 | |
| Oppenheim,Ethan | 1668 | 1547 | 12764520 | 8/31/2012 | |
| Oppenheim,Evan | 1772 | 1497 | 12769580 | 3/31/2008 | |
| Opperman,Shane | 12860730 | ||||
| Oprea,Gabriel Adr | 17058590 | 5/31/2020 | |||
| Oprea,Sebastian R | 17058604 | 5/31/2020 | |||
| Orapallo,Christop | 16573807 | 1/31/2019 | |||
| Orapallo,Tony | 1181 | 12484991 | |||
| Oravetz,Justin | 12443559 | ||||
| Oravetz,William F | 12418999 | ||||
| Oravitz,Olianna | 108/07 | 108/07 | 15814385 | 10/31/2016 | |
| Orbin,Max Louis | 981/04 | 988/04 | 30892040 | 12/31/2023 | |
| Orchowski,Kerry A | 12807535 | ||||
| Orchowski,Tyler J | 805/14 | 31130157 | 3/31/2026 | ||
| Orcutt,Kevin | 1175/05 | 1175/05 | 14227535 | 6/30/2011 | |
| Ordiway,Vernon M | 1292 | 12632547 | |||
| Ordo,Joseph | 1700 | 1808 | 10149720 | ||
| Ordonez,Nadia | 12878846 | ||||
| Ore,Chris | 1274 | 20042432 | |||
| Ore,Gregg | 12660037 | ||||
| Orechowski,Edward | 1023/05 | 12719341 | |||
| Orehowsky,Brendan | 611/19 | 601/19 | 16905155 | 2/28/2027 | |
| Orelli,Christophe | 831/16 | 737/11 | 31175346 | 4/30/2024 | |
| Oren,Dvir | 1363 | 20081224 | |||
| Orenstein,Max | 1281 | 956 | 14866927 | 12/31/2018 | |
| Orenstein,Mikaela | 798 | 801 | 15831661 | 2/28/2022 | |
| Oresanwo,Yemisi | 410/08 | 418/08 | 15894456 | 12/31/2016 | |
| Orford,Keith | 30357350 | 11/30/2022 | |||
| Orgass,Matthew | 12558335 | ||||
| Orger,Michael B | 1257 | 12895828 | 5/31/2007 | ||
| Oriero,Jaquelline | 1542 | 12457458 | |||
| Orihuel,Eric | 1207/08 | 12745733 | |||
| Oring,Myles Eli | 32712465 | 12/31/2026 | |||
| Ork,Kong | 1009/10 | 12647962 | |||
| Orlando,Andy | 12729652 | ||||
| Orlando,Chris | 12851266 | ||||
| Orlando,Chris | 13332312 | 1/31/2007 | |||
| Orlando,James A | 16355722 | 4/30/2018 | |||
| Orlando,James P | 16355716 | 4/30/2018 | |||
| Orlando,Matthew | 13684740 | ||||
| Orlemann,Ben K | 569/04 | 593/04 | 14956192 | 8/31/2013 | |
| Orlicki,Steve R | 1284 | 1209/14 | 12889989 | ||
| Orloff,Seth Thoma | 193/04 | 191/04 | 14503704 | 10/31/2011 | |
| Ormes-Strong,Akir | 423 | 422 | 13434028 | 6/30/2009 | |
| Ornato,Vince | 837 | 591/09 | 31261366 | 9/30/2026 | |
| Orner,Gerald | 1554 | 12113600 | |||
| Orner,Jake | 231/08 | 230/08 | 16528843 | 11/30/2018 | |
| Oronto-Pratt,Jose | 557/04 | 544/04 | 17171487 | 10/31/2020 | |
| Oros,Daniel J | 12444636 | 6/30/2006 | |||
| Orozbaev,Kubat | 1455/06 | 31451576 | 10/31/2024 | ||
| Orozbaev,Umar | 454/06 | 31451562 | 10/31/2024 | ||
| Orr,Andrew | 1657 | 1577 | 14265996 | 1/31/2024 | |
| Orr,Daniel G | 698 | 653 | 15689225 | 7/31/2022 | |
| Orr,Delbert S | 12683361 | 10/31/2006 | |||
| Orr,John B | 1859 | 11236308 | 2/28/2007 | ||
| Orraca-Tetteh,Jos | 1963 | 12451290 | 9/30/2008 | ||
| Orsatti,Ben | 808/05 | 12588465 | |||
| Orsatti,Mark | 30861148 | ||||
| Orsatti,Mark L | 1517 | 10144515 | 11/30/2025 | ||
| Orseno,Alex | 32839426 | 1/31/2027 | |||
| Orson,Daniel | 368/05 | 329/05 | 13686327 | 3/31/2008 | |
| Ortega,Emma | 30046867 | 10/31/2021 | |||
| Ortega,Joaquin | 30046879 | 10/31/2021 | |||
| Ortega,Jose | 663/09 | 485/04 | 17298015 | 2/28/2021 | |
| Ortega-Zhinin,Pri | 204/23 | 196/23 | 17134496 | 11/30/2021 | |
| Ortenzio,Louis F | 20124910 | ||||
| Ortes,Danitrov | 446/09 | 419/08 | 32620828 | 10/31/2026 | |
| Ortiz,Alanis | 31238516 | ||||
| Ortiz,Alanis | 420/09 | 383/09 | 31244385 | 5/31/2024 | |
| Ortiz,Alex | 12732104 | ||||
| Ortiz,Angel H | 628/05 | 12799845 | |||
| Ortiz,Ayden | 281/23 | 281/23 | 16359903 | 10/31/2020 | |
| Ortiz,Danny | 30128486 | 2/28/2022 | |||
| Ortiz,Efrain | 690/23 | 701/23 | 16359918 | 10/31/2020 | |
| Ortiz,Efrain F | 840 | 802 | 15136161 | 4/30/2026 | |
| Ortiz,Israel | 1603 | 12615662 | |||
| Ortiz,Israel | 14823167 | 1/31/2013 | |||
| Ortiz,Juan C | 1123 | 20080849 | |||
| Ortiz,Michael | 1354 | 20006351 | |||
| Ortiz,Shanaiah Is | 16765426 | 8/31/2019 | |||
| Ortiz,Sydney | 290 | 284 | 15345258 | 10/31/2017 | |
| Ortiz,Trent | 1055 | 820/21 | 14253197 | 12/31/2012 | |
| Ortizdevillate,Al | 498 | 441 | 16474961 | 11/30/2019 | |
| Ortlip,Amanda | 515/14 | 12739039 | |||
| Ortlip,Michael | 14472282 | 8/31/2011 | |||
| Orwin,Daniel M | 12706106 | ||||
| Oryl,Colin Lee | 352/05 | 323/05 | 16456462 | 2/28/2022 | |
| Orzechowski,Kevin | 12648056 | ||||
| Os,Alex | 585 | 12729377 | |||
| Osada,Jesse Hugh | 1113/13 | 30923492 | 1/31/2024 | ||
| Osadtsa,Modest | 12908985 | 7/31/2010 | |||
| Osborn,Ethan | 32353342 | ||||
| Osborne,Andre | 263/19 | 283/12 | 12888744 | 11/30/2007 | |
| Osborne,Cara M. | 877 | 20031797 | |||
| Osborne,Donald L | 1604 | 1530 | 12430064 | ||
| Osborne,Eyrin M | 297/07 | 293/07 | 15626597 | 1/31/2016 | |
| Osborne,Jason E. | 1342 | 20031848 | |||
| Osborne,Lukas | 32246815 | 1/31/2026 | |||
| Osborne,Mark | 15192592 | 5/31/2014 | |||
| Osborne,Marquan | 1152 | 1078 | 15598991 | 12/31/2016 | |
| Osbourn,Gordon D | 975 | 12187400 | 3/31/2008 | ||
| Osele,Jamie L | 561 | 12729379 | |||
| Osele,Kiel A | 648/08 | 12742586 | |||
| Osenberg,Ike | 666 | 633 | 14620361 | 1/31/2016 | |
| Oshlag,Nathan | 493 | 509/22 | 12840051 | ||
| Osinski,David | 12522055 | ||||
| Osipovich,Alexand | 1900 | 1840 | 12180540 | 4/30/2013 | |
| Osipovich,Alexand | 12520380 | ||||
| Oskanian,John | 102/10 | 102/10 | 15691100 | 3/31/2016 | |
| Oskanian,Peter | 413/10 | 411/10 | 15691273 | 3/31/2016 | |
| Oskey,Philip | 12735947 | ||||
| Osman,Kevin J | 12476134 | ||||
| Osmolovskiy,Micha | 1071 | 1045 | 14568654 | 3/31/2017 | |
| Osorio,Carlos A | 1020/06 | 12649468 | |||
| Osorio,Willis | 315/17 | 304/17 | 30757853 | 10/31/2023 | |
| Osorio-Gutierrez, | 15174113 | 5/31/2014 | |||
| Osorio-Gutierrez, | 15174128 | 5/31/2014 | |||
| Osorio-Reynoso,Ed | 409/07 | 406/07 | 17257146 | 1/31/2021 | |
| Ospino,Francisco | 287/12 | 174/10 | 15123425 | 3/31/2014 | |
| Osseo-Asare,Kwame | 12555803 | ||||
| Ossman,John W | 12603766 | ||||
| Ostanek,Jason | 648/05 | 12564954 | |||
| Oster,Roger W | 1065/04 | 1150/09 | 12626448 | ||
| Ostermann,Martin | 1735 | 12479749 | |||
| Osterneck,Julian | 12457623 | ||||
| Ostertag,George N | 12508631 | ||||
| Osthoff,Ada L | 714/04 | 12726076 | |||
| Ostick,Paul | 466/13 | 12707121 | |||
| Ostimchuk,Eric | 20053458 | ||||
| Ostlund,Grant J | 12515203 | ||||
| Ostlund,Jonathan | 516/19 | 540/18 | 12853365 | 12/31/2005 | |
| Ostolaza,Aitor F | 1814 | 12117130 | 4/30/2011 | ||
| Ostravage,Jesse | 1180 | 1138 | 31165864 | 6/30/2026 | |
| Ostroff,Clayton M | 1899 | 1120 | 15842812 | 3/31/2021 | |
| Ostrom,Jennah C | 232/04 | 12888699 | |||
| Ostrosky,Tom D | 1840 | 1741 | 12498798 | 9/30/2022 | |
| Ostroverkhov,Yevh | 814 | 787 | 16843754 | 1/31/2021 | |
| Ostrowski,Joey | 898 | 897 | 12938604 | 3/31/2009 | |
| Ostrowsky,Spencer | 1051/10 | 759/06 | 16003838 | 3/31/2017 | |
| Ostrum,Mile | 877/10 | 12865082 | |||
| Ostwald,Mordecai | 12548004 | ||||
| Osunkwo,Brennan | 1028/10 | 30546233 | 12/31/2025 | ||
| Osunkwo,Brennan | 31338335 | ||||
| Oswald,Albert | 12440210 | ||||
| Oswald,Harmony Ni | 13959170 | ||||
| Oswald,Ray S | 12459591 | ||||
| Oswald,Richard Br | 13959164 | 4/30/2009 | |||
| Otero,Caleb | 578/09 | 529/09 | 16852778 | 11/30/2019 | |
| Otero,Jamil | 274/04 | 233/04 | 16391312 | 7/31/2019 | |
| Otero-Sanchez,Nat | 387 | 400 | 16795028 | 9/30/2019 | |
| Oterson,Andy | 1417 | 12540822 | |||
| Otitoyomi,Chelsea | 30525274 | 3/31/2023 | |||
| Otoni-Oliveira,Ro | 30519064 | 3/31/2023 | |||
| Otroba,Thomas T | 706 | 12677361 | |||
| Otsuki,Mio | 101/05 | 101/05 | 32127922 | 11/30/2026 | |
| Ott,Isaac D | 12531181 | ||||
| Ott,John G | 923/04 | 12651381 | |||
| Ott,Michael W | 2020 | 10144469 | 12/31/2099 | ||
| Ott,Richard | 964 | 12471351 | |||
| Ott,Richard E | 12666504 | ||||
| Ott,Ronald L | 12521962 | ||||
| Ottaviano,Anthony | 32893489 | 2/28/2027 | |||
| Otte,Harry | 579 | 564 | 12786812 | 12/31/2005 | |
| Otten,Andrew | 424/12 | 424/12 | 16820092 | 10/31/2019 | |
| Ottey,Paul C | 12404973 | ||||
| Otthi,Pavan | 818 | 798 | 14048866 | 6/30/2016 | |
| Otthi,Praneeth | 516 | 484 | 15276907 | 2/28/2021 | |
| Otto,Andre Casper | 989/06 | 31248234 | 5/31/2025 | ||
| Otto,Casparus Dan | 695/04 | 31248220 | 5/31/2024 | ||
| Otto,Gene E | 20042288 | ||||
| Otto,Michael F | 1668 | 12456971 | |||
| Otusanya,Ayosegun | 611/04 | 12610756 | |||
| Otway,Connor | 355/05 | 355/05 | 14188986 | 3/31/2010 | |
| Ou,James | 1288/17 | 21001624 | |||
| Ou,Jason | 483/08 | 465/08 | 16474976 | 10/31/2018 | |
| Ou,Miles | 32562513 | 9/30/2026 | |||
| Ouaknine,Joel | 2268/15 | 12577127 | |||
| Ousley,David E | 12687339 | 9/30/2006 | |||
| Ousley,David Earl | 12512100 | ||||
| Outen,Bobby | 12445489 | ||||
| Outlaw,Desmen | 12941504 | 7/31/2005 | |||
| Outlaw-Bey,Gene | 12743070 | ||||
| Outten,Joel Thoma | 1248/14 | 1272/14 | 13489260 | 8/31/2009 | |
| Outting,Kyle Lama | 1306/08 | 12761906 | |||
| Outwater,Kenneth | 777/05 | 14387340 | 3/31/2011 | ||
| Ouyang,Amy | 364 | 274 | 14023928 | 7/31/2011 | |
| Ouyang,Joshua | 1200 | 1168 | 15272747 | 10/31/2019 | |
| Ouyang,Kevin | 666 | 664 | 13741818 | 7/31/2011 | |
| Ouyang,Oijia | 12677069 | ||||
| Ouyang,Robbie | 878/04 | 859/04 | 32127749 | 11/30/2025 | |
| Ouyang,Robbie | 359/04 | 352/04 | 32749972 | 12/31/2026 | |
| Ouzomgi,Brian Abr | 1117 | 15612178 | 2/28/2019 | ||
| Overbaugh,Nichola | 673/04 | 12772744 | |||
| Overby,Lamont | 12961136 | 9/30/2005 | |||
| Overcashier,Lee | 12778240 | ||||
| Overlie,Finn | 1600 | 1400 | 13157316 | 1/31/2024 | |
| Overly,Bernard L | 1526 | 1504 | 12437795 | 12/31/2023 | |
| Overpeck,Aidan Ja | 106/08 | 106/08 | 16131233 | 10/31/2017 | |
| Overpeck,Brendan | 206/04 | 206/04 | 16308850 | 3/31/2018 | |
| Overton,Cherlize | 17097414 | 7/31/2020 | |||
| Overton,Zaire | 266/04 | 255/04 | 16503555 | 11/30/2018 | |
| Overwise,Paul | 751/18 | 12701755 | |||
| Ovick,Erik | 579 | 580 | 13792203 | 11/30/2011 | |
| Ovorak,Jeremy C | 20065709 | ||||
| Owen,Rank | 13906642 | 2/28/2009 | |||
| Owen,Zac | 12889987 | ||||
| Owen-Kennedy,Alex | 269/08 | 263/08 | 30549320 | 4/30/2023 | |
| Owens,Aaron | 1115 | 20000138 | |||
| Owens,Alton | 13440388 | 4/30/2007 | |||
| Owens,Brendan | 13677194 | 3/31/2008 | |||
| Owens,Christopher | 1418 | 1139 | 15122636 | 9/30/2019 | |
| Owens,Dejuan | 102/08 | 102/08 | 13915048 | 3/31/2009 | |
| Owens,Jalen | 249/07 | 211/07 | 12928399 | ||
| Owens,John W | 12496754 | ||||
| Owens,Jonathan | 12479781 | ||||
| Owens,Marcus | 879 | 20018755 | |||
| Owens,Silas | 274/08 | 274/08 | 15350395 | 4/30/2017 | |
| Owens,Thomas | 105/06 | 105/06 | 16855077 | 11/30/2019 | |
| Owens,Willa White | 1526 | 10262038 | |||
| Owens,Zahir | 32755788 | 12/31/2026 | |||
| Owens-Johnson,Kar | 202/04 | 209/04 | 16041892 | 4/30/2017 | |
| Owings,Brandon E | 440 | 12863154 | |||
| Owings,J B | 12499198 | ||||
| Owlett,Carson Eva | 1632 | 1245/08 | 15128636 | 7/31/2015 | |
| Owlett,Steven Eva | 1366 | 1090/13 | 15197651 | 7/31/2018 | |
| Owoc,Anthony | 1680 | 1668/14 | 12567805 | ||
| Owocki,David A | 2121 | 2045/16 | 13776382 | 12/31/2014 | |
| Owsiany,Alexandra | 14080982 | 12/31/2009 | |||
| Owsiany,Alina | 110/08 | 110/08 | 13853516 | 1/31/2009 | |
| Oxenford,Jr.,Ryan | 262/06 | 262/06 | 31025925 | 2/29/2024 | |
| Oxenford,William | 12666042 | ||||
| Oxman,Ari | 1773 | 1716 | 12779256 | 1/31/2008 | |
| Oyerly,Grayson Be | 171/06 | 171/06 | 17120234 | 7/31/2024 | |
| Oyler,Ronald | 12468794 | ||||
| Oyola,Kimayra | 159/04 | 175/04 | 31536939 | 11/30/2024 | |
| Oz,Eli | 161/09 | 158/09 | 32702863 | 11/30/2026 | |
| Ozbek,Melih | 2203 | 2069 | 14471053 | 1/31/2027 | |
| Ozdogan,Bulent | 1521 | 12544821 | |||
| Ozer,Ayse | 254/04 | 266/04 | 13186465 | 5/31/2006 | |
| Ozer,Ilan | 1249/18 | 12673650 | |||
| Ozer,Muhammed | 13186450 | 5/31/2006 | |||
| Ozimek,Timothy E | 12601155 | ||||
| Ozman,Ela | 103/04 | 103/04 | 17233107 | 12/31/2020 | |
| Ozols,Arabella | 103/04 | 103/04 | 32666417 | 11/30/2026 | |
| Ozols,Brandon | 784/04 | 790/04 | 32666422 | 11/30/2026 | |
| Players who were active since 1/1/92.
Ratings include the April 2026 supplement. | |||||