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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frank Jackson | 0-2016 | 1 | 2 | .333 | 18.90 | 6 | 0 | 0 | 0 | 0 | 3.1 | 4 | 7 | 1 | 3 | 3 |
| Jason Jackson | 0-2015 | 4 | 5 | .444 | 7.97 | 14 | 12 | 0 | 0 | 0 | 61.0 | 78 | 54 | 9 | 34 | 47 |
| Leroy Jackson | 1-2016 | 9 | 7 | .562 | 7.47 | 30 | 22 | 0 | 0 | 0 | 127.2 | 186 | 106 | 12 | 74 | 97 |
| Ricky Jackson | 5-2024 | 21 | 15 | .583 | 3.64 | 97 | 43 | 2 | 0 | 1 | 334.0 | 304 | 135 | 22 | 140 | 241 |
| Timothy Jackson | 1-2021 | 13 | 12 | .520 | 4.25 | 151 | 12 | 0 | 0 | 5 | 230.2 | 266 | 109 | 12 | 114 | 181 |
| Corbin Jameson | 0-2025 | 2 | 3 | .400 | 5.66 | 17 | 0 | 0 | 0 | 9 | 20.2 | 18 | 13 | 1 | 14 | 21 |
| Edward Jensen | 0-2018 | 5 | 4 | .556 | 5.19 | 59 | 0 | 0 | 0 | 2 | 85.0 | 95 | 49 | 9 | 41 | 71 |
| Félix Jiménez | 1-2016 | 8 | 14 | .364 | 5.16 | 32 | 32 | 0 | 0 | 0 | 186.2 | 196 | 107 | 21 | 94 | 213 |
| Mario Jiménez | 1-2022 | 13 | 7 | .650 | 4.32 | 102 | 0 | 0 | 0 | 1 | 145.2 | 151 | 70 | 13 | 56 | 136 |
| Ji Jing | 0-2025 | 8 | 2 | .800 | 2.18 | 12 | 12 | 1 | 0 | 0 | 82.2 | 57 | 20 | 2 | 38 | 71 |
| Cole Johnson | 0-2022 | 5 | 11 | .312 | 3.85 | 22 | 20 | 0 | 0 | 0 | 107.2 | 113 | 46 | 3 | 48 | 106 |
| James Johnson | 0-2018 | 1 | 2 | .333 | 4.46 | 22 | 0 | 0 | 0 | 0 | 34.1 | 34 | 17 | 4 | 16 | 29 |
| Jim Johnstone | 0-2016 | 0 | 0 | .000 | 8.03 | 8 | 0 | 0 | 0 | 0 | 12.1 | 24 | 11 | 0 | 5 | 7 |
| Barry Jones | 0-2016 | 3 | 4 | .429 | 4.43 | 47 | 0 | 0 | 0 | 14 | 40.2 | 41 | 20 | 3 | 24 | 61 |
| Bryan Jones | 0-2022 | 8 | 21 | .276 | 4.49 | 232 | 0 | 0 | 0 | 69 | 236.1 | 211 | 118 | 20 | 161 | 236 |
| Teddy Jones | 2-2018 | 14 | 12 | .538 | 3.18 | 39 | 32 | 1 | 1 | 0 | 220.2 | 192 | 78 | 13 | 110 | 184 |
| Tom Jones | 6-2022 | 17 | 17 | .500 | 3.85 | 64 | 57 | 1 | 0 | 1 | 358.0 | 325 | 153 | 30 | 135 | 390 |
| Greg Jordan | 0-2018 | 14 | 10 | .583 | 3.21 | 85 | 0 | 0 | 0 | 38 | 87.0 | 73 | 31 | 5 | 43 | 98 |
| José Juárez | 0-2024 | 1 | 4 | .200 | 4.75 | 36 | 0 | 0 | 0 | 0 | 36.0 | 35 | 19 | 3 | 20 | 27 |
| José Juárez | 0-2024 | 0 | 2 | .000 | 6.26 | 8 | 3 | 1 | 0 | 0 | 23.0 | 29 | 16 | 0 | 11 | 14 |
