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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Edwin Jackson | 2016-2016 | 11 | 11 | .500 | 4.05 | 29 | 29 | 1 | 0 | 0 | 160.0 | 156 | 72 | 24 | 66 | 110 |
| Kyle Jacobsen | 2022-2025 | 0 | 0 | .000 | 54.00 | 1 | 0 | 0 | 0 | 0 | 0.2 | 2 | 4 | 1 | 2 | 0 |
| Kenley Jansen | 2015-2023 | 30 | 45 | .400 | 2.74 | 549 | 0 | 0 | 0 | 270 | 578.0 | 406 | 176 | 50 | 221 | 814 |
| Casey Janssen | 2015-2018 | 9 | 9 | .500 | 4.55 | 240 | 0 | 0 | 0 | 6 | 255.0 | 285 | 129 | 38 | 66 | 195 |
| Jeremy Jeffress | 2015-2020 | 1 | 1 | .500 | 2.01 | 19 | 0 | 0 | 0 | 2 | 22.1 | 17 | 5 | 1 | 11 | 13 |
| Tyrell Jenkins | 2017-2018 | 1 | 3 | .250 | 4.35 | 32 | 0 | 0 | 0 | 0 | 49.2 | 57 | 24 | 4 | 13 | 49 |
| Dan Jennings | 2015-2017 | 3 | 1 | .750 | 2.83 | 26 | 0 | 0 | 0 | 0 | 28.2 | 17 | 9 | 1 | 8 | 35 |
| Brian Johnson | 2018-2025 | 12 | 14 | .462 | 4.06 | 37 | 29 | 2 | 0 | 0 | 199.1 | 197 | 90 | 25 | 63 | 133 |
| Claude Johnson | 2024-2024 | 2 | 2 | .500 | 6.69 | 31 | 0 | 0 | 0 | 0 | 37.2 | 38 | 28 | 3 | 46 | 28 |
| Cobi Johnson | 2021-2024 | 9 | 14 | .391 | 4.12 | 58 | 25 | 3 | 1 | 0 | 207.2 | 184 | 95 | 18 | 74 | 173 |
| Jim Johnson | 2015-2017 | 14 | 9 | .609 | 3.57 | 210 | 0 | 0 | 0 | 2 | 222.0 | 193 | 88 | 20 | 75 | 175 |
| Josh Johnson | 2016-2021 | 30 | 30 | .500 | 4.35 | 238 | 59 | 4 | 2 | 5 | 650.0 | 642 | 314 | 63 | 241 | 471 |
| Pierce Johnson | 2022-2025 | 19 | 30 | .388 | 4.85 | 78 | 77 | 4 | 2 | 0 | 434.2 | 443 | 234 | 56 | 170 | 360 |
| Ben Jordan | 2021-2025 | 43 | 35 | .551 | 4.04 | 122 | 113 | 9 | 1 | 0 | 720.0 | 698 | 323 | 91 | 237 | 677 |
