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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Matt Jachec | 2024-2025 | 4 | 2 | .667 | 8.90 | 22 | 0 | 0 | 0 | 2 | 31.1 | 52 | 31 | 14 | 18 | 30 |
| Jordan Jackson | 2025-2025 | 3 | 3 | .500 | 5.20 | 9 | 9 | 0 | 0 | 0 | 55.1 | 56 | 32 | 5 | 17 | 45 |
| Justin Jackson | 2017-2017 | 2 | 1 | .667 | 5.75 | 36 | 0 | 0 | 0 | 1 | 76.2 | 88 | 49 | 10 | 44 | 56 |
| Tanner Jacobson | 2022-2022 | 0 | 0 | .000 | 6.75 | 4 | 0 | 0 | 0 | 0 | 4.0 | 1 | 3 | 0 | 7 | 6 |
| Keegan James | 2023-2023 | 2 | 8 | .200 | 5.60 | 25 | 25 | 0 | 0 | 0 | 101.1 | 112 | 63 | 12 | 69 | 79 |
| Jordan Jankowski | 2013-2014 | 4 | 12 | .250 | 5.82 | 43 | 28 | 0 | 0 | 0 | 150.0 | 178 | 97 | 14 | 82 | 120 |
| Jack Jasiak | 2024-2025 | 7 | 2 | .778 | 7.84 | 39 | 0 | 0 | 0 | 0 | 62.0 | 83 | 54 | 15 | 58 | 60 |
| Cristian Javier | 2019-2019 | 3 | 1 | .750 | 2.38 | 8 | 8 | 0 | 0 | 0 | 41.2 | 34 | 11 | 4 | 19 | 34 |
| Myles Jaye | 2016-2016 | 0 | 1 | .000 | 3.31 | 3 | 3 | 0 | 0 | 0 | 16.1 | 12 | 6 | 1 | 7 | 15 |
| Zach Jemiola | 2015-2018 | 9 | 7 | .562 | 4.56 | 64 | 14 | 0 | 0 | 1 | 142.0 | 164 | 72 | 16 | 49 | 131 |
| Bryce Jenkins | 2023-2023 | 0 | 1 | .000 | 18.00 | 3 | 0 | 0 | 0 | 0 | 2.0 | 6 | 4 | 0 | 3 | 3 |
| Ryan Jennings | 2022-2022 | 1 | 0 | 1.000 | 2.25 | 5 | 0 | 0 | 0 | 0 | 8.0 | 7 | 2 | 1 | 6 | 8 |
| Steven Jennings | 2020-2020 | 1 | 0 | 1.000 | 3.28 | 16 | 0 | 0 | 0 | 1 | 35.2 | 30 | 13 | 2 | 20 | 25 |
| Jordan Jess | 2018-2019 | 9 | 5 | .643 | 6.53 | 71 | 0 | 0 | 0 | 2 | 91.0 | 103 | 66 | 15 | 65 | 103 |
| Emerson Jimenez | 2021-2021 | 1 | 1 | .500 | 1.71 | 16 | 0 | 0 | 0 | 0 | 31.2 | 19 | 6 | 2 | 12 | 24 |
| Nick Jobst | 2018-2018 | 1 | 0 | 1.000 | 6.03 | 18 | 0 | 0 | 0 | 1 | 31.1 | 47 | 21 | 6 | 15 | 38 |
| Jake Johansen | 2015-2018 | 3 | 3 | .500 | 5.33 | 78 | 4 | 0 | 0 | 2 | 133.1 | 112 | 79 | 24 | 96 | 175 |
| Cole Johnson | 2013-2015 | 6 | 5 | .545 | 4.76 | 36 | 7 | 0 | 0 | 9 | 73.2 | 76 | 39 | 3 | 40 | 60 |
| Hobbs Johnson | 2015-2017 | 1 | 9 | .100 | 8.59 | 29 | 18 | 0 | 0 | 4 | 88.0 | 125 | 84 | 13 | 61 | 81 |
| Jordan Johnson | 2017-2020 | 15 | 22 | .405 | 4.89 | 78 | 72 | 0 | 0 | 2 | 383.0 | 397 | 208 | 59 | 186 | 381 |
| Kaleo Johnson | 2019-2020 | 0 | 0 | .000 | 36.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 3 | 4 | 0 | 5 | 0 |
| Kevin Johnson | 2015-2015 | 1 | 0 | 1.000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 2.0 | 3 | 0 | 0 | 0 | 3 |
| Marcus Johnson | 2022-2022 | 1 | 2 | .333 | 5.25 | 3 | 2 | 0 | 0 | 0 | 12.0 | 7 | 7 | 2 | 7 | 24 |
| Ryan Johnson | 2025-2025 | 0 | 0 | .000 | 8.44 | 1 | 1 | 0 | 0 | 0 | 5.1 | 5 | 5 | 0 | 5 | 6 |
| Ty Johnson | 2024-2025 | 6 | 1 | .857 | 5.68 | 12 | 7 | 0 | 0 | 0 | 50.2 | 53 | 32 | 9 | 33 | 40 |
| Tyler Johnson | 2022-2023 | 4 | 3 | .571 | 5.01 | 26 | 0 | 0 | 0 | 0 | 46.2 | 47 | 26 | 6 | 20 | 52 |
| Reid Johnston | 2025-2025 | 4 | 0 | 1.000 | 5.59 | 22 | 1 | 0 | 0 | 1 | 56.1 | 78 | 35 | 7 | 25 | 40 |
| Eric Jokisch | 2013-2014 | 9 | 12 | .429 | 4.31 | 31 | 31 | 1 | 1 | 0 | 192.0 | 207 | 92 | 13 | 72 | 163 |
| Chris Jones | 2013-2013 | 0 | 0 | .000 | 1.10 | 12 | 0 | 0 | 0 | 0 | 16.1 | 7 | 2 | 0 | 9 | 20 |
| Kyle Jones | 2022-2022 | 1 | 0 | 1.000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 3.0 | 2 | 0 | 0 | 0 | 5 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Matt A. Jones | 2018-2018 | 0 | 0 | .000 | 27.00 | 4 | 0 | 0 | 0 | 0 | 0.1 | 2 | 1 | 0 | 1 | 1 |
| Stephen Jones | 2025-2025 | 2 | 1 | .667 | 3.44 | 32 | 0 | 0 | 0 | 2 | 68.0 | 51 | 26 | 5 | 36 | 88 |
| Tyler Jones | 2014-2016 | 2 | 9 | .182 | 5.49 | 79 | 0 | 0 | 0 | 9 | 78.2 | 82 | 48 | 10 | 35 | 82 |
| Jose Jose | 2016-2016 | 0 | 2 | .000 | 3.51 | 22 | 0 | 0 | 0 | 12 | 25.2 | 24 | 10 | 0 | 11 | 23 |
| Ben Joyce | 2023-2023 | 0 | 0 | .000 | 0.00 | 2 | 0 | 0 | 0 | 1 | 4.2 | 1 | 0 | 0 | 2 | 4 |
| Victor Juarez | 2023-2024 | 9 | 9 | .500 | 4.04 | 39 | 39 | 0 | 0 | 0 | 198.1 | 192 | 89 | 27 | 81 | 153 |
| Hayden Juenger | 2022-2024 | 7 | 11 | .389 | 4.37 | 44 | 31 | 0 | 0 | 7 | 177.0 | 174 | 86 | 23 | 56 | 153 |
| Cameron Junker | 2023-2025 | 5 | 1 | .833 | 4.47 | 60 | 0 | 0 | 0 | 1 | 114.2 | 100 | 57 | 12 | 63 | 110 |
