| Jean Niklas L'orange | 42 | 5.4Medium |
| Jean-Christophe Filliâtre | 1 | 5.8Hard |
| Jeff Ifland | 11 | 3.9Medium |
| Jeff Kinne | 1 | 1.4Easy |
| Jeffrey Peng | 1 | 6.5Hard |
| Jennifer Lhoták | 1 | 7.3Hard |
| Jennifer Shimada | 1 | 6.6Hard |
| Jeroen Bransen | 9 | 3.7Medium |
| Jeroen de Jong | 1 | 7.3Hard |
| Jerry Li | 3 | 6.2Hard |
| Jesper Öqvist | 4 | 6Hard |
| Jevgēnijs Vihrovs | 1 | 5.1Medium |
| Jiacheng Wu | 2 | 3.6Medium |
| Jiju Poovvancheri | 3 | 5.3Medium |
| Jim Grimmett | 10 | 5.1Medium |
| Jimmy Mårdell | 21 | 5.8Hard |
| Jingbang Chen | 1 | 7.1Hard |
| Jingbo Shang | 8 | 5.1Medium |
| Jodi Tims | 1 | 1.6Easy |
| Joel Andersson | 1 | 1.8Easy |
| Johan Sannemo | 178 | 5.1Medium |
| John Bonomo | 64 | 4.9Medium |
| John Buck | 3 | 3.1Medium |
| John Cigas | 7 | 2.2Easy |
| John Dethridge | 4 | 5.8Hard |
| John Hedin | 1 | 2.1Easy |
| John Henke | 6 | 4.4Medium |
| John Keyser | 2 | 6.3Hard |
| John Zheng | 7 | 5.3Medium |
| Jon Ander Gómez | 3 | 5Medium |
| Jon Marius Venstad | 10 | 5.2Medium |
| Jonatan Nilsson | 1 | 6.3Hard |
| Jonathan Cederlund | 3 | 4.1Medium |
| Jonathan Chong | 4 | 2.7Easy |
| Jonathan Hallström | 6 | 3.9Medium |
| Jonathan Lööv | 1 | 3.1Medium |
| Jonathan Shen | 6 | 4.5Medium |
| Jonathon Robel | 2 | 5.1Medium |
| Joran van Apeldoorn | 1 | 5.1Medium |
| Jordan Newport | 2 | 3Medium |
| Joris van Rantwijk | 5 | 5.3Medium |
| Jorke de Vlas | 18 | 5Medium |
| Josee Tasse | 11 | 3.5Medium |
| Josef Cibulka | 1 | 7.5Hard |
| Joseph Claver | 3 | 5.3Medium |
| Joseph Durie | 11 | 4.9Medium |
| Joseph McKinsey | 1 | 4.4Medium |
| Joseph Meleshko | 2 | 5.1Medium |
| Joseph Swernofsky | 3 | 3.9Medium |
| Josh Brown-Kramer | 1 | 4.2Medium |
| Josh Taylor | 2 | 4.9Medium |
| Joshua Andersson | 40 | 5.5Medium |
| Joshua Moerman | 3 | 6.1Hard |
| Joshua T. Guerin | 9 | 3.2Medium |
| Josse van Dobben de Bruyn | 7 | 3.9Medium |
| José Paulo Leal | 1 | 4.1Medium |
| Jozef Šiška | 1 | 3.4Medium |
| Julia Mårtensson | 10 | 4.9Medium |
| Julian Baldus | 3 | 5.9Hard |
| Julian Dörfler | 1 | 5.8Hard |
| Julian Neeleman | 1 | 7.3Hard |
| Julietta Rozin | 1 | 1.4Easy |
| Julius Thunström | 2 | 6.1Hard |
| Junbin Teng | 1 | 7.5Hard |
| Justas Klimas | 2 | 6.6Hard |
| Justas Klimavičius | 1 | 4.3Medium |
| Justin Li | 5 | 5.2Medium |
| Justin Park | 1 | 2.2Easy |
| Jón Steinn Elíasson | 2 | 4.7Medium |
| Kai Chen | 3 | 4.4Medium |
| Karl Johan Sande Heimark | 9 | 5Medium |
| Karl Lundstig | 1 | 1.5Easy |
| Kathleen Ericson | 9 | 3.2Medium |
| Katie Chang | 1 | 2.7Easy |
| Keenan Schott | 1 | 1.4Easy |
| Kelly Dance | 9 | 5.6Hard |
| Kent Williams-King | 4 | 6.8Hard |
| Keshav Bhadauria | 1 | 3Medium |
| Kevin Chen | 4 | 6.4Hard |
| Kevin Kinney | 1 | 3.4Medium |
| Kevin Li | 3 | 6.4Hard |
| Khaled Ismaeel | 1 | 5.4Medium |
| Kimberly Brown | 2 | 4.9Medium |
| Konráð Elí Sigurgeirsson | 8 | 2.2Easy |
| Kostiantyn Denysov | 1 | 5.2Medium |
| Kriangsiri Malasri | 9 | 4.3Medium |
| Kristof Unterweger | 1 | 5.7Hard |
| Kristoffer Arnsfelt Hansen | 1 | 6.1Hard |
| Kristoffer Æsøy | 3 | 4.9Medium |
| Kuan Wei Heng | 1 | 3.4Medium |
| Kwee Lung Sin | 3 | 7.4Hard |
| Kyle H | 1 | 8.4Hard |
| Kyle See | 2 | 6.1Hard |
| Lalitha Kuppa | 3 | 3.7Medium |
| Lammert Westerdijk | 1 | 1.6Easy |
| Lap Chi Lau | 1 | 5.5Hard |
| Larry D. Pyeatt | 2 | 6Hard |
| Larry Pyeatt | 3 | 2.9Medium |
| Lars Huth | 1 | 6.8Hard |
| Lars Åström | 3 | 3.7Medium |
