| Jack Rosenthal | 3 | 2.1Easy |
| Jacob Merizia | 1 | 4Medium |
| Jacob Plachta | 3 | 4.7Medium |
| Jacob Zhang | 6 | 5.7Hard |
| Jacques-Henri Jourdan | 1 | 7.7Hard |
| Jaehyun Park | 1 | 7.1Hard |
| Jakob Israelsen | 1 | 7.4Hard |
| Jakob Krainz | 3 | 4.6Medium |
| Jakub Onufry Wojtaszczyk | 4 | 5.4Medium |
| Jakub Pachocki | 2 | 7.6Hard |
| Jakub Radoszewski | 1 | 5.7Hard |
| Jakub Tarnawski | 1 | 7.1Hard |
| Jakub Závodný | 1 | 8.1Hard |
| Jalal Almhana | 2 | 4.9Medium |
| James Feher | 5 | 2.5Easy |
| James Hughes | 1 | 6.9Hard |
| James R (Bob) Bradley | 1 | 2.1Easy |
| James Stanley | 1 | 3.3Medium |
| Jan Elffers | 4 | 5.3Medium |
| Jan Kuipers | 8 | 5.9Hard |
| Jan Stoklasa | 1 | 6.5Hard |
| Jasmin Studer | 1 | 4.3Medium |
| Jason Cannon | 4 | 3.5Medium |
| Jason Huang | 2 | 5.4Medium |
| Jason Liu | 3 | 5.1Medium |
| Jason Pham | 1 | 3.7Medium |
| Javier Gómez Serrano | 3 | 5.9Hard |
| Jean Niklas L'orange | 22 | 5.1Medium |
| Jean-Christophe Filliâtre | 1 | 5.8Hard |
| Jeff Ifland | 2 | 6.9Hard |
| Jeff Kinne | 1 | 1.5Easy |
| Jeffrey Peng | 1 | 6.7Hard |
| Jennifer Lhoták | 1 | 7.9Hard |
| Jennifer Shimada | 1 | 5.2Medium |
| Jeroen Bransen | 8 | 3.8Medium |
| Jeroen de Jong | 1 | 7.3Hard |
| Jerry Li | 2 | 5.9Hard |
| Jesper Öqvist | 4 | 6Hard |
| Jevgēnijs Vihrovs | 1 | 4.7Medium |
| Jiacheng Wu | 2 | 3.8Medium |
| Jiju Poovvancheri | 2 | 4.7Medium |
| Jim Grimmett | 10 | 5.1Medium |
| Jimmy Mårdell | 20 | 5.6Hard |
| Jingbo Shang | 8 | 5.3Medium |
| Johan Sannemo | 172 | 5.1Medium |
| John Bonomo | 53 | 4.9Medium |
| John Buck | 3 | 2.4Easy |
| John Cigas | 4 | 1.9Easy |
| John Dethridge | 4 | 6Hard |
| John Hedin | 1 | 2.2Easy |
| John Keyser | 2 | 6.6Hard |
| John Zheng | 4 | 5Medium |
| Jon Ander Gómez | 3 | 5.2Medium |
| Jon Marius Venstad | 10 | 5.2Medium |
| Jonathan Chong | 4 | 2.8Medium |
| Jonathan Hallström | 6 | 4.1Medium |
| Jonathan Lööv | 1 | 3.7Medium |
| Jonathan Shen | 6 | 4Medium |
| Joran van Apeldoorn | 1 | 5.1Medium |
| Joris van Rantwijk | 5 | 5.5Hard |
| Jorke de Vlas | 8 | 4.9Medium |
| Josee Tasse | 2 | 4.5Medium |
| Josef Cibulka | 1 | 6.5Hard |
| Joseph Meleshko | 1 | 7.4Hard |
| Joseph Swernofsky | 3 | 4Medium |
| Josh Brown-Kramer | 1 | 4.3Medium |
| Josh Taylor | 1 | 6.4Hard |
| Joshua Andersson | 25 | 5.3Medium |
| Joshua Moerman | 3 | 5.9Hard |
| Joshua T. Guerin | 9 | 3.2Medium |
| Josse van Dobben de Bruyn | 7 | 4Medium |
| José Paulo Leal | 1 | 4.4Medium |
| Jozef Šiška | 1 | 3.1Medium |
| Julia Mårtensson | 9 | 5.3Medium |
| Julian Baldus | 2 | 6.4Hard |
| Julian Dörfler | 1 | 6.1Hard |
| Julian Neeleman | 1 | 8.4Hard |
| Julius Thunström | 1 | 8.8Hard |
| Junbin Teng | 1 | 7.4Hard |
| Justas Klimas | 1 | 7.3Hard |
| Justas Klimavičius | 1 | 4.3Medium |
| Justin Li | 3 | 6.5Hard |
| Justin Park | 1 | 2.4Easy |
| Jón Steinn Elíasson | 2 | 5.5Medium |
| Kai Chen | 3 | 4.4Medium |
| Karl Johan Sande Heimark | 9 | 5Medium |
| Karl Lundstig | 1 | 1.6Easy |
| Kathleen Ericson | 9 | 3.2Medium |
| Katie Chang | 1 | 2.5Easy |
| Kent Williams-King | 4 | 7Hard |
| Konráð Elí Sigurgeirsson | 4 | 1.2Easy |
| Kristof Unterweger | 1 | 5.6Hard |
| Kristoffer Arnsfelt Hansen | 1 | 6Hard |
| Kuan Wei Heng | 1 | 3.5Medium |
| Kwee Lung Sin | 3 | 7.6Hard |
| Kyle See | 2 | 6.5Hard |
| Lalitha Kuppa | 3 | 3.4Medium |
| Lap Chi Lau | 1 | 5.9Hard |
| Larry D. Pyeatt | 2 | 6.1Hard |
| Larry Pyeatt | 3 | 2.9Medium |
