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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 |
|---|---|---|---|---|---|---|---|---|---|
| Jason Jackson | 2016-2016 | .000 | 0 | 0 | 7 | 7 | 0 | 4.98 | 96 |
| Kevin Jackson | 2017-2018 | .322 | 16 | 72 | 0 | 0 | 0 | 0.00 | 0 |
| Ricky Jackson | 2024-2024 | .000 | 0 | 0 | 11 | 7 | 0 | 4.03 | 99 |
| Leonard James | 2024-2024 | .285 | 11 | 64 | 0 | 0 | 0 | 0.00 | 0 |
| Gerd Jans | 2016-2023 | .000 | 0 | 0 | 2 | 3 | 0 | 5.75 | 53 |
| Rudy Jedburgh | 2016-2017 | .261 | 9 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Jared Jefferson | 2017-2022 | .348 | 46 | 179 | 0 | 0 | 0 | 0.00 | 0 |
| Gil Jenkins | 2019-2020 | .271 | 15 | 62 | 0 | 0 | 0 | 0.00 | 0 |
| John Jenkins | 2015-2022 | .279 | 19 | 89 | 0 | 0 | 0 | 0.00 | 0 |
| Jon Jenkins | 2020-2023 | .282 | 4 | 47 | 0 | 0 | 0 | 0.00 | 0 |
| Edward Jensen | 2019-2019 | .000 | 0 | 0 | 1 | 1 | 0 | 12.64 | 24 |
| Ares Jilavian | 2015-2015 | .368 | 2 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Félix Jiménez | 2016-2018 | .000 | 0 | 0 | 13 | 15 | 0 | 5.80 | 285 |
| Luis Jiménez | 2021-2023 | .303 | 7 | 62 | 0 | 0 | 0 | 0.00 | 0 |
| Mario Jiménez | 2016-2020 | .000 | 0 | 0 | 9 | 3 | 2 | 5.18 | 82 |
| Cole Johnson | 2016-2020 | .000 | 0 | 0 | 22 | 27 | 0 | 4.83 | 375 |
| John Johnson | 2016-2016 | .333 | 1 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Paul Johnson | 2019-2019 | .219 | 3 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Anthony Johnston | 2018-2024 | .334 | 4 | 94 | 0 | 0 | 0 | 0.00 | 0 |
| Curt Johnston | 2023-2023 | .259 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Denver Johnston | 2024-2024 | .000 | 0 | 0 | 3 | 1 | 0 | 3.51 | 26 |
| Walt Johnston | 2021-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 2.16 | 7 |
| Dustin Johnstone | 2018-2020 | .298 | 13 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Steven Johnstone | 2020-2020 | .247 | 3 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Ethan Jollymour | 2015-2019 | .300 | 23 | 109 | 0 | 0 | 0 | 0.00 | 0 |
| Barry Jones | 2015-2021 | .000 | 0 | 0 | 18 | 10 | 43 | 3.53 | 237 |
| Bryan Jones | 2021-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 4 |
| Henry Jones | 2021-2022 | .291 | 0 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Joey Jones | 2024-2024 | .343 | 3 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2015-2016 | .000 | 0 | 0 | 7 | 6 | 5 | 4.20 | 114 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Rod Jones | 2021-2021 | .250 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Tom Jones | 2019-2022 | .000 | 0 | 0 | 14 | 9 | 0 | 4.29 | 170 |
| Tommy Jones | 2024-2024 | .333 | 1 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Greg Jordan | 2019-2019 | .000 | 0 | 0 | 0 | 0 | 0 | 8.44 | 14 |
| Johnny Joyce | 2021-2022 | .000 | 0 | 0 | 6 | 8 | 4 | 6.46 | 15 |
| Arlen Joysey | 2024-2024 | .266 | 9 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Miguel Juárez | 2021-2022 | .311 | 15 | 70 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Júlio | 2022-2022 | .000 | 0 | 0 | 0 | 0 | 1 | 0.00 | 1 |
