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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Allan Jackson | 2019-2031 | .265 | 212 | 809 | 0 | 0 | 0 | 0.00 | 0 |
| Barrett Jackson | 2030-2030 | .000 | 0 | 0 | 0 | 0 | 0 | 6.75 | 4 |
| Brit Jackson | 2012-2021 | .000 | 0 | 0 | 32 | 30 | 13 | 5.37 | 472 |
| Bryan Jackson | 2019-2020 | .000 | 0 | 0 | 0 | 2 | 0 | 5.60 | 12 |
| Carlton Jackson | 2032-2032 | .248 | 1 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Joe Jackson | 2031-2032 | .000 | 0 | 0 | 1 | 2 | 1 | 3.72 | 27 |
| Kevin Jackson | 2022-2023 | .000 | 0 | 0 | 2 | 2 | 1 | 4.37 | 22 |
| Stephen Jackson | 2012-2021 | .314 | 178 | 643 | 0 | 0 | 0 | 0.00 | 0 |
| Coy Jacobs | 2024-2032 | .276 | 4 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| John Jacobs | 2021-2031 | .000 | 0 | 0 | 41 | 55 | 271 | 3.44 | 557 |
| Johnny Jacobs | 2022-2024 | .000 | 0 | 0 | 3 | 1 | 1 | 7.66 | 72 |
| Todd Jacobs | 2021-2027 | .277 | 106 | 322 | 0 | 0 | 0 | 0.00 | 0 |
| Eddy Jacobse | 2026-2032 | .313 | 19 | 259 | 0 | 0 | 0 | 0.00 | 0 |
| David Jacobson | 2030-2032 | .225 | 5 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Nathan Jacobson | 2031-2032 | .194 | 1 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Jacobson | 2020-2021 | .211 | 8 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jahn | 2025-2025 | .230 | 9 | 47 | 0 | 0 | 0 | 0.00 | 0 |
| Steve James | 2012-2019 | .245 | 46 | 183 | 0 | 0 | 0 | 0.00 | 0 |
| Joaquín Jaramillo | 2026-2028 | .294 | 17 | 78 | 0 | 0 | 0 | 0.00 | 0 |
| José Jaramillo | 2017-2022 | .266 | 5 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Jaramillo | 2025-2032 | .291 | 61 | 371 | 0 | 0 | 0 | 0.00 | 0 |
| Bhavsar Jayasurya | 2026-2027 | .199 | 9 | 44 | 0 | 0 | 0 | 0.00 | 0 |
| Geoffrey Jellineck | 2021-2028 | .229 | 15 | 49 | 0 | 0 | 0 | 0.00 | 0 |
| Martin Jenkins | 2019-2021 | .248 | 2 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Jenkins | 2021-2027 | .000 | 0 | 0 | 18 | 34 | 0 | 6.62 | 201 |
| Lou Jensen | 2018-2020 | .232 | 11 | 83 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jeremy | 2027-2032 | .257 | 36 | 246 | 0 | 0 | 0 | 0.00 | 0 |
| Lawrence Jewers | 2022-2028 | .269 | 64 | 248 | 0 | 0 | 0 | 0.00 | 0 |
| Gilberto Jiménez | 2024-2032 | .329 | 192 | 635 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jiménez | 2027-2027 | .189 | 5 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Hai-dong Joe | 2020-2023 | .263 | 5 | 68 | 0 | 0 | 0 | 0.00 | 0 |
| Billy Joel | 2031-2032 | .239 | 9 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Andrew Johnson | 2031-2032 | .000 | 0 | 0 | 3 | 4 | 1 | 8.28 | 39 |
| Chris Johnson | 2024-2026 | .000 | 0 | 0 | 2 | 9 | 1 | 8.69 | 61 |
| Jack Johnson | 2013-2021 | .250 | 127 | 459 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Johnson | 2015-2023 | .299 | 93 | 515 | 0 | 0 | 0 | 0.00 | 0 |
| Ronnie Johnson | 2023-2029 | .273 | 47 | 216 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Johnson | 2020-2023 | .287 | 17 | 115 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Johnson | 2012-2022 | .115 | 0 | 2 | 50 | 45 | 38 | 4.00 | 693 |
| Tanner Johnson | 2024-2032 | .000 | 0 | 0 | 171 | 49 | 0 | 2.42 | 1940 |
| Todd Johnson | 2013-2023 | .000 | 0 | 0 | 26 | 14 | 9 | 6.11 | 575 |
| Joshua Johnston | 2017-2022 | .224 | 2 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Paul Johnston | 2028-2032 | .000 | 0 | 0 | 59 | 64 | 0 | 4.26 | 720 |
| Paul Johnston | 2014-2026 | .000 | 0 | 0 | 158 | 111 | 1 | 4.57 | 1610 |
| Steve Johnston | 2017-2018 | .000 | 0 | 0 | 1 | 10 | 0 | 6.88 | 58 |
| Jordan Johnstone | 2018-2018 | .000 | 0 | 0 | 5 | 3 | 0 | 5.62 | 27 |
| Kai Jolliffe | 2027-2031 | .258 | 1 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Daniel Jones | 2013-2020 | .000 | 0 | 0 | 11 | 5 | 7 | 5.02 | 271 |
| Harvey Jones | 2012-2017 | .000 | 0 | 0 | 6 | 6 | 2 | 5.45 | 148 |
| John Jones | 2015-2022 | .256 | 19 | 171 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2017-2024 | .000 | 0 | 0 | 32 | 41 | 187 | 3.48 | 831 |
| Lee Jones | 2021-2032 | .287 | 23 | 300 | 0 | 0 | 0 | 0.00 | 0 |
| Nathan Jones | 2017-2020 | .261 | 26 | 138 | 0 | 0 | 0 | 0.00 | 0 |
| Oscar Jones | 2023-2032 | .268 | 106 | 437 | 0 | 0 | 0 | 0.00 | 0 |
| Chris Joseph | 2020-2026 | .269 | 38 | 129 | 0 | 0 | 0 | 0.00 | 0 |
| James Jostle | 2030-2032 | .000 | 0 | 0 | 16 | 15 | 0 | 2.96 | 350 |
| Keiji Jouon | 2015-2021 | .000 | 0 | 0 | 22 | 22 | 18 | 4.88 | 442 |
| Bruce Joyner | 2016-2022 | .286 | 79 | 314 | 0 | 0 | 0 | 0.00 | 0 |
| Wei-qiang Ju | 2030-2032 | .289 | 27 | 113 | 0 | 0 | 0 | 0.00 | 0 |
| Loeck Jurgens | 2026-2032 | .000 | 0 | 0 | 65 | 61 | 6 | 4.45 | 750 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Frank Justiniano | 2029-2029 | .000 | 0 | 0 | 7 | 15 | 0 | 6.01 | 81 |
