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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Greg Jacknewitz | 2018-2019 | 1 | 3 | .250 | 10.41 | 17 | 1 | 0 | 0 | 0 | 27.2 | 48 | 32 | 5 | 20 | 9 |
| Andre Jackson | 2024-2025 | 3 | 3 | .500 | 4.60 | 31 | 0 | 0 | 0 | 1 | 58.2 | 66 | 30 | 7 | 29 | 49 |
| Drew Jackson | 2019-2022 | 0 | 0 | .000 | 17.18 | 3 | 0 | 0 | 0 | 0 | 3.2 | 5 | 7 | 0 | 8 | 3 |
| Jay Jackson | 2022-2022 | 3 | 2 | .600 | 9.15 | 18 | 0 | 0 | 0 | 0 | 20.2 | 40 | 21 | 6 | 10 | 19 |
| Zach Jackson | 2021-2024 | 7 | 2 | .778 | 5.40 | 50 | 0 | 0 | 0 | 15 | 55.0 | 65 | 33 | 6 | 35 | 43 |
| Alek Jacob | 2025-2025 | 8 | 4 | .667 | 4.44 | 32 | 0 | 0 | 0 | 2 | 50.2 | 58 | 25 | 11 | 12 | 46 |
| Josh James | 2022-2025 | 9 | 4 | .692 | 4.47 | 57 | 2 | 0 | 0 | 3 | 112.2 | 115 | 56 | 21 | 64 | 103 |
| Jordan Jankowski | 2018-2018 | 3 | 2 | .600 | 6.00 | 25 | 0 | 0 | 0 | 1 | 36.0 | 37 | 24 | 5 | 29 | 39 |
| Travis Jankowski | 2016-2025 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 0.2 | 1 | 0 | 0 | 2 | 0 |
| Mickey Jannis | 2016-2016 | 0 | 0 | .000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.1 | 0 | 0 | 0 | 1 | 2 |
| Cristian Javier | 2025-2025 | 0 | 0 | .000 | 1.64 | 2 | 1 | 0 | 0 | 0 | 11.0 | 4 | 2 | 0 | 5 | 9 |
| Tyler Jay | 2018-2018 | 0 | 0 | .000 | 4.41 | 12 | 0 | 0 | 0 | 0 | 16.1 | 16 | 8 | 6 | 6 | 17 |
| Myles Jaye | 2017-2017 | 4 | 4 | .500 | 7.40 | 13 | 13 | 0 | 0 | 0 | 62.0 | 79 | 51 | 13 | 30 | 44 |
| Dan Jennings | 2014-2021 | 12 | 11 | .522 | 4.46 | 144 | 0 | 0 | 0 | 42 | 151.1 | 179 | 75 | 10 | 66 | 135 |
| Ryan Jensen | 2024-2024 | 2 | 1 | .667 | 1.54 | 6 | 0 | 0 | 0 | 0 | 11.2 | 8 | 2 | 0 | 8 | 4 |
| Kevin Jepsen | 2016-2016 | 0 | 0 | .000 | 2.70 | 4 | 0 | 0 | 0 | 0 | 6.2 | 4 | 2 | 1 | 4 | 5 |
| Williams Jerez | 2018-2018 | 0 | 1 | .000 | 6.46 | 14 | 6 | 0 | 0 | 0 | 23.2 | 26 | 17 | 3 | 22 | 16 |
| A.J. Jimenez | 2018-2019 | 0 | 0 | .000 | 13.50 | 1 | 0 | 0 | 0 | 0 | 2.0 | 3 | 3 | 1 | 2 | 0 |
| Dany Jimenez | 2024-2025 | 4 | 1 | .800 | 4.03 | 39 | 0 | 0 | 0 | 1 | 76.0 | 65 | 34 | 6 | 45 | 72 |
| Joe Jimenez | 2018-2019 | 1 | 1 | .500 | 3.29 | 10 | 0 | 0 | 0 | 1 | 13.2 | 11 | 5 | 2 | 11 | 18 |
| Chase Johnson | 2020-2023 | 14 | 17 | .452 | 4.90 | 88 | 36 | 0 | 0 | 2 | 283.0 | 275 | 154 | 33 | 142 | 201 |
| Erik Johnson | 2015-2017 | 20 | 10 | .667 | 5.58 | 78 | 32 | 0 | 0 | 3 | 264.2 | 294 | 164 | 36 | 106 | 232 |
| Jeff Johnson | 2015-2015 | 1 | 2 | .333 | 5.18 | 15 | 0 | 0 | 0 | 0 | 24.1 | 27 | 14 | 3 | 10 | 14 |
| Jim Johnson | 2016-2016 | 3 | 1 | .750 | 4.72 | 39 | 0 | 0 | 0 | 2 | 40.0 | 43 | 21 | 2 | 17 | 40 |
| Michael Johnson | 2018-2021 | 6 | 8 | .429 | 4.92 | 105 | 0 | 0 | 0 | 6 | 162.2 | 178 | 89 | 23 | 77 | 132 |
| Pierce Johnson | 2016-2020 | 10 | 5 | .667 | 5.38 | 56 | 11 | 0 | 0 | 9 | 118.2 | 135 | 71 | 12 | 59 | 109 |
| Seth Johnson | 2024-2025 | 7 | 4 | .636 | 3.94 | 40 | 6 | 0 | 0 | 2 | 80.0 | 86 | 35 | 10 | 48 | 59 |
| Tyler Johnson | 2024-2025 | 2 | 1 | .667 | 2.55 | 13 | 0 | 0 | 0 | 7 | 17.2 | 16 | 5 | 0 | 9 | 13 |
| Chase Johnson-Mullins | 2018-2018 | 0 | 1 | .000 | 6.75 | 2 | 2 | 0 | 0 | 0 | 10.2 | 13 | 8 | 1 | 4 | 3 |
| Chris Jones | 2016-2016 | 1 | 1 | .500 | 5.00 | 9 | 0 | 0 | 0 | 0 | 18.0 | 19 | 10 | 2 | 7 | 16 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Nate Jones | 2013-2014 | 8 | 13 | .381 | 6.00 | 136 | 0 | 0 | 0 | 9 | 126.0 | 159 | 84 | 15 | 64 | 124 |
| Spencer Jones | 2021-2021 | 1 | 0 | 1.000 | 4.70 | 16 | 0 | 0 | 0 | 7 | 15.1 | 17 | 8 | 1 | 7 | 14 |
| Taylor Jordan | 2014-2017 | 14 | 23 | .378 | 5.00 | 60 | 57 | 1 | 0 | 1 | 313.0 | 371 | 174 | 25 | 110 | 202 |
| Felix Jorge | 2017-2020 | 19 | 20 | .487 | 5.29 | 58 | 55 | 0 | 0 | 0 | 301.0 | 384 | 177 | 38 | 104 | 137 |
| Zach Joyce | 2025-2025 | 1 | 5 | .167 | 3.46 | 55 | 0 | 0 | 0 | 43 | 52.0 | 39 | 20 | 9 | 21 | 57 |
| Hayden Juenger | 2021-2021 | 2 | 0 | 1.000 | 2.70 | 11 | 0 | 0 | 0 | 0 | 20.0 | 11 | 6 | 0 | 4 | 34 |
| Gage Jump | 2025-2025 | 1 | 4 | .200 | 6.23 | 6 | 5 | 0 | 0 | 0 | 26.0 | 40 | 18 | 3 | 10 | 18 |
| Taylor Jungmann | 2016-2016 | 8 | 4 | .667 | 4.14 | 21 | 15 | 1 | 0 | 0 | 104.1 | 90 | 48 | 7 | 48 | 92 |
| Jakob Junis | 2024-2024 | 8 | 9 | .471 | 4.48 | 26 | 26 | 1 | 1 | 0 | 164.2 | 184 | 82 | 23 | 45 | 109 |
| Janson Junk | 2022-2025 | 20 | 23 | .465 | 5.85 | 108 | 42 | 0 | 0 | 4 | 381.1 | 433 | 248 | 74 | 135 | 237 |
| Ariel Jurado | 2017-2021 | 8 | 10 | .444 | 4.65 | 44 | 28 | 0 | 0 | 1 | 184.0 | 217 | 95 | 22 | 56 | 85 |
