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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 | 2015-2016 | 1 | 1 | .500 | 4.65 | 35 | 0 | 0 | 0 | 0 | 50.1 | 48 | 26 | 3 | 25 | 42 |
| Ricky Jackson | 2020-2021 | 5 | 13 | .278 | 3.79 | 62 | 16 | 0 | 0 | 21 | 145.0 | 151 | 61 | 12 | 59 | 100 |
| Timothy Jackson | 2015-2024 | 10 | 22 | .312 | 4.90 | 121 | 24 | 2 | 1 | 5 | 303.0 | 347 | 165 | 26 | 122 | 183 |
| Justin Jamerson | 2016-2021 | 0 | 1 | .000 | 5.06 | 21 | 0 | 0 | 0 | 1 | 37.1 | 38 | 21 | 5 | 18 | 38 |
| Rudy Jenkins | 2016-2022 | 5 | 7 | .417 | 3.78 | 22 | 19 | 0 | 0 | 0 | 123.2 | 120 | 52 | 14 | 45 | 97 |
| Bill Jensen | 2018-2018 | 0 | 0 | .000 | 4.41 | 13 | 0 | 0 | 0 | 0 | 16.1 | 16 | 8 | 3 | 5 | 8 |
| Edward Jensen | 2015-2016 | 3 | 2 | .600 | 2.98 | 36 | 0 | 0 | 0 | 0 | 51.1 | 45 | 17 | 3 | 31 | 49 |
| Mario Jiménez | 2021-2022 | 5 | 2 | .714 | 3.09 | 35 | 0 | 0 | 0 | 3 | 58.1 | 43 | 20 | 5 | 27 | 37 |
| Cole Johnson | 2021-2022 | 7 | 9 | .438 | 3.59 | 28 | 28 | 0 | 0 | 0 | 155.1 | 150 | 62 | 3 | 59 | 117 |
| Donald Johnson | 2017-2018 | 6 | 7 | .462 | 4.04 | 74 | 0 | 0 | 0 | 11 | 64.2 | 72 | 29 | 4 | 45 | 73 |
| Franklin Johnson | 2019-2019 | 0 | 0 | .000 | 6.17 | 5 | 0 | 0 | 0 | 0 | 11.2 | 16 | 8 | 1 | 11 | 10 |
| James Johnson | 2017-2018 | 7 | 9 | .438 | 4.46 | 77 | 15 | 0 | 0 | 1 | 149.1 | 153 | 74 | 17 | 77 | 129 |
| Denver Johnston | 2015-2016 | 0 | 0 | .000 | 0.00 | 4 | 0 | 0 | 0 | 0 | 2.2 | 1 | 0 | 0 | 3 | 5 |
| Jim Johnstone | 2017-2022 | 14 | 15 | .483 | 4.88 | 46 | 42 | 6 | 2 | 0 | 276.2 | 318 | 150 | 21 | 122 | 196 |
| Bryan Jones | 2020-2020 | 4 | 2 | .667 | 2.75 | 18 | 0 | 0 | 0 | 0 | 36.0 | 23 | 11 | 3 | 25 | 35 |
| Leon Jones | 2019-2019 | 1 | 5 | .167 | 8.04 | 12 | 9 | 0 | 0 | 0 | 47.0 | 76 | 42 | 12 | 27 | 17 |
| Steven Jones | 2021-2022 | 4 | 3 | .571 | 3.83 | 37 | 0 | 0 | 0 | 10 | 42.1 | 39 | 18 | 3 | 28 | 32 |
| Teddy Jones | 2020-2022 | 20 | 13 | .606 | 4.92 | 73 | 32 | 0 | 0 | 2 | 248.2 | 231 | 136 | 20 | 131 | 209 |
| Johnny Joyce | 2019-2020 | 4 | 2 | .667 | 4.68 | 20 | 6 | 0 | 0 | 0 | 57.2 | 65 | 30 | 3 | 17 | 45 |
| José Juárez | 2022-2024 | 6 | 4 | .600 | 2.96 | 47 | 4 | 0 | 0 | 2 | 91.1 | 73 | 30 | 7 | 37 | 77 |
| José Júlio | 2018-2018 | 1 | 1 | .500 | 5.35 | 18 | 0 | 0 | 0 | 0 | 38.2 | 45 | 23 | 3 | 19 | 39 |
