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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barrett Jackson | 2030-2030 | 0 | 0 | .000 | 6.75 | 3 | 0 | 0 | 0 | 0 | 4.0 | 5 | 3 | 2 | 1 | 4 |
| Brit Jackson | 2012-2021 | 32 | 30 | .516 | 5.37 | 427 | 22 | 1 | 0 | 13 | 603.0 | 687 | 360 | 101 | 273 | 472 |
| Bryan Jackson | 2019-2020 | 0 | 2 | .000 | 5.60 | 4 | 4 | 0 | 0 | 0 | 17.2 | 28 | 11 | 3 | 8 | 12 |
| Joe Jackson | 2031-2032 | 1 | 2 | .333 | 3.72 | 18 | 0 | 0 | 0 | 1 | 19.1 | 14 | 8 | 4 | 3 | 27 |
| Kevin Jackson | 2022-2023 | 2 | 2 | .500 | 4.37 | 43 | 0 | 0 | 0 | 1 | 55.2 | 61 | 27 | 5 | 40 | 22 |
| John Jacobs | 2021-2031 | 41 | 55 | .427 | 3.44 | 580 | 0 | 0 | 0 | 271 | 596.0 | 590 | 228 | 46 | 201 | 557 |
| Johnny Jacobs | 2022-2024 | 3 | 1 | .750 | 7.66 | 56 | 0 | 0 | 0 | 1 | 103.1 | 156 | 88 | 16 | 51 | 72 |
| Ryan Jenkins | 2021-2027 | 18 | 34 | .346 | 6.62 | 84 | 73 | 2 | 0 | 0 | 387.1 | 538 | 285 | 56 | 114 | 201 |
| Andrew Johnson | 2031-2032 | 3 | 4 | .429 | 8.28 | 16 | 5 | 0 | 0 | 1 | 45.2 | 77 | 42 | 9 | 23 | 39 |
| Chris Johnson | 2024-2026 | 2 | 9 | .182 | 8.69 | 38 | 14 | 0 | 0 | 1 | 107.2 | 144 | 104 | 18 | 88 | 61 |
| Steve Johnson | 2012-2022 | 50 | 45 | .526 | 4.00 | 628 | 24 | 1 | 0 | 38 | 903.2 | 987 | 402 | 41 | 311 | 693 |
| Tanner Johnson | 2024-2032 | 171 | 49 | .777 | 2.42 | 266 | 266 | 48 | 17 | 0 | 1985.2 | 1747 | 533 | 36 | 306 | 1940 |
| Todd Johnson | 2013-2023 | 26 | 14 | .650 | 6.11 | 396 | 15 | 0 | 0 | 9 | 634.2 | 803 | 431 | 137 | 244 | 575 |
| Paul Johnston | 2028-2032 | 59 | 64 | .480 | 4.26 | 160 | 158 | 16 | 3 | 0 | 1072.2 | 1134 | 508 | 117 | 286 | 720 |
| Paul Johnston | 2014-2026 | 158 | 111 | .587 | 4.57 | 359 | 337 | 38 | 6 | 1 | 2272.2 | 2425 | 1154 | 254 | 765 | 1610 |
| Steve Johnston | 2017-2018 | 1 | 10 | .091 | 6.88 | 18 | 13 | 0 | 0 | 0 | 83.2 | 85 | 64 | 10 | 53 | 58 |
| Jordan Johnstone | 2018-2018 | 5 | 3 | .625 | 5.62 | 15 | 11 | 0 | 0 | 0 | 65.2 | 65 | 41 | 4 | 43 | 27 |
| Daniel Jones | 2013-2020 | 11 | 5 | .688 | 5.02 | 202 | 0 | 0 | 0 | 7 | 301.0 | 321 | 168 | 41 | 148 | 271 |
| Harvey Jones | 2012-2017 | 6 | 6 | .500 | 5.45 | 140 | 0 | 0 | 0 | 2 | 165.0 | 182 | 100 | 23 | 72 | 148 |
| John Jones | 2017-2024 | 32 | 41 | .438 | 3.48 | 541 | 0 | 0 | 0 | 187 | 536.0 | 421 | 207 | 70 | 219 | 831 |
| James Jostle | 2030-2032 | 16 | 15 | .516 | 2.96 | 50 | 50 | 0 | 0 | 0 | 292.1 | 224 | 96 | 29 | 98 | 350 |
| Keiji Jouon | 2015-2021 | 22 | 22 | .500 | 4.88 | 353 | 5 | 0 | 0 | 18 | 515.0 | 588 | 279 | 59 | 211 | 442 |
| Loeck Jurgens | 2026-2032 | 65 | 61 | .516 | 4.45 | 205 | 164 | 13 | 5 | 6 | 1083.2 | 1167 | 536 | 134 | 289 | 750 |
| Frank Justiniano | 2029-2029 | 7 | 15 | .318 | 6.01 | 26 | 26 | 1 | 0 | 0 | 158.2 | 205 | 106 | 28 | 60 | 81 |
