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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 | 2019-2020 | 2 | 6 | .250 | 9.40 | 13 | 9 | 0 | 0 | 0 | 37.1 | 47 | 39 | 7 | 31 | 23 |
| Andre Jackson | 2020-2021 | 3 | 2 | .600 | 4.74 | 24 | 15 | 0 | 0 | 0 | 87.1 | 98 | 46 | 7 | 38 | 75 |
| Alek Jacob | 2022-2024 | 4 | 13 | .235 | 5.10 | 59 | 13 | 0 | 0 | 18 | 113.0 | 120 | 64 | 20 | 48 | 81 |
| Tanner Jacobson | 2024-2024 | 1 | 1 | .500 | 4.74 | 4 | 4 | 0 | 0 | 0 | 19.0 | 18 | 10 | 2 | 18 | 16 |
| David Jagoditsh | 2013-2017 | 5 | 16 | .238 | 7.37 | 83 | 18 | 0 | 0 | 2 | 174.2 | 242 | 143 | 25 | 121 | 149 |
| Mac James | 2017-2023 | 0 | 0 | .000 | 32.40 | 2 | 0 | 0 | 0 | 0 | 1.2 | 4 | 6 | 1 | 7 | 3 |
| Hyun-seok Jang | 2024-2024 | 0 | 1 | .000 | 2.25 | 5 | 5 | 0 | 0 | 0 | 12.0 | 4 | 3 | 0 | 8 | 19 |
| Thomas Jankins | 2018-2023 | 0 | 2 | .000 | 14.82 | 16 | 6 | 0 | 0 | 0 | 44.1 | 79 | 73 | 3 | 65 | 31 |
| Ryan January | 2020-2024 | 0 | 1 | .000 | 21.00 | 2 | 0 | 0 | 0 | 0 | 3.0 | 4 | 7 | 0 | 9 | 1 |
| Griffin Jax | 2017-2018 | 0 | 5 | .000 | 11.43 | 19 | 12 | 0 | 0 | 0 | 65.1 | 123 | 83 | 16 | 73 | 51 |
| Tyler Jay | 2019-2021 | 4 | 2 | .667 | 4.11 | 51 | 0 | 0 | 0 | 6 | 70.0 | 73 | 32 | 4 | 31 | 58 |
| Myles Jaye | 2018-2019 | 8 | 6 | .571 | 5.62 | 35 | 16 | 0 | 0 | 3 | 121.2 | 144 | 76 | 14 | 60 | 73 |
| Michael Jefferson | 2013-2013 | 4 | 16 | .200 | 7.09 | 30 | 30 | 1 | 1 | 0 | 144.2 | 200 | 114 | 16 | 77 | 103 |
| Liam Jenkins | 2023-2023 | 1 | 1 | .500 | 14.79 | 9 | 0 | 0 | 0 | 0 | 14.0 | 25 | 23 | 3 | 16 | 6 |
| Ryan Jensen | 2021-2022 | 6 | 7 | .462 | 5.22 | 35 | 16 | 0 | 0 | 0 | 110.1 | 90 | 64 | 14 | 72 | 109 |
| Kevin Jepsen | 2017-2017 | 4 | 0 | 1.000 | 2.20 | 30 | 0 | 0 | 0 | 1 | 57.1 | 38 | 14 | 3 | 23 | 86 |
| Williams Jerez | 2014-2021 | 13 | 5 | .722 | 3.54 | 109 | 0 | 0 | 0 | 9 | 140.0 | 103 | 55 | 15 | 65 | 194 |
| Brody Jessee | 2024-2025 | 5 | 3 | .625 | 6.07 | 49 | 1 | 0 | 0 | 1 | 118.2 | 154 | 80 | 16 | 55 | 121 |
| Luke Jewett | 2025-2025 | 4 | 3 | .571 | 5.93 | 43 | 0 | 0 | 0 | 2 | 82.0 | 111 | 54 | 18 | 43 | 65 |
| Carlos Jimenez | 2024-2025 | 6 | 3 | .667 | 8.32 | 47 | 0 | 0 | 0 | 0 | 83.1 | 92 | 77 | 11 | 71 | 90 |
| Eddie Jimenez | 2021-2021 | 2 | 1 | .667 | 2.76 | 20 | 0 | 0 | 0 | 0 | 32.2 | 20 | 10 | 3 | 28 | 26 |
| Joe Jimenez | 2017-2021 | 5 | 2 | .714 | 3.09 | 49 | 0 | 0 | 0 | 23 | 55.1 | 42 | 19 | 6 | 26 | 79 |
| Johendi Jiminian | 2015-2015 | 4 | 8 | .333 | 5.61 | 25 | 25 | 0 | 0 | 0 | 112.1 | 128 | 70 | 17 | 62 | 109 |
| Ulises Joaquin | 2016-2016 | 0 | 0 | .000 | 5.81 | 35 | 0 | 0 | 0 | 1 | 52.2 | 61 | 34 | 7 | 41 | 53 |
| Boby Johnson | 2022-2024 | 5 | 4 | .556 | 3.29 | 56 | 0 | 0 | 0 | 9 | 90.1 | 89 | 33 | 14 | 37 | 84 |
| Brandon Johnson | 2024-2024 | 5 | 4 | .556 | 6.83 | 39 | 0 | 0 | 0 | 0 | 55.1 | 64 | 42 | 15 | 39 | 56 |
| Jacob Johnson | 2014-2015 | 11 | 3 | .786 | 6.64 | 105 | 0 | 0 | 0 | 2 | 168.0 | 173 | 124 | 15 | 68 | 169 |
| Jared Johnson | 2024-2025 | 4 | 8 | .333 | 5.55 | 39 | 18 | 0 | 0 | 1 | 116.2 | 119 | 72 | 20 | 81 | 104 |
| Luke Johnson | 2025-2025 | 1 | 0 | 1.000 | 1.96 | 4 | 3 | 0 | 0 | 0 | 18.1 | 19 | 4 | 1 | 9 | 15 |
| MD Johnson | 2022-2022 | 2 | 1 | .667 | 3.79 | 4 | 4 | 0 | 0 | 0 | 19.0 | 16 | 8 | 1 | 11 | 24 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Michael Johnson | 2017-2017 | 0 | 1 | .000 | 8.22 | 11 | 0 | 0 | 0 | 0 | 15.1 | 24 | 14 | 4 | 8 | 14 |
| Pierce Johnson | 2019-2019 | 6 | 0 | 1.000 | 3.54 | 28 | 0 | 0 | 0 | 2 | 53.1 | 42 | 21 | 4 | 35 | 71 |
| Stephen Johnson | 2018-2019 | 4 | 2 | .667 | 17.56 | 49 | 3 | 0 | 0 | 0 | 54.1 | 122 | 106 | 21 | 82 | 21 |
| Kyle Johnston | 2023-2023 | 5 | 1 | .833 | 2.23 | 27 | 0 | 0 | 0 | 9 | 44.1 | 36 | 11 | 3 | 20 | 46 |
| Will Johnston | 2025-2025 | 2 | 0 | 1.000 | 3.66 | 4 | 4 | 0 | 0 | 0 | 19.2 | 15 | 8 | 1 | 11 | 16 |
| Brock Jones | 2025-2025 | 4 | 3 | .571 | 8.91 | 38 | 1 | 0 | 0 | 2 | 63.2 | 94 | 63 | 9 | 57 | 34 |
| Cory Jones | 2016-2017 | 7 | 4 | .636 | 5.54 | 44 | 11 | 0 | 0 | 0 | 91.0 | 100 | 56 | 12 | 56 | 92 |
| Kyle Jones | 2025-2025 | 8 | 7 | .533 | 7.08 | 24 | 24 | 0 | 0 | 0 | 115.2 | 162 | 91 | 16 | 54 | 86 |
| Nick Jones | 2024-2024 | 1 | 2 | .333 | 5.49 | 18 | 0 | 0 | 0 | 8 | 19.2 | 22 | 12 | 3 | 14 | 20 |
| Spencer Jones | 2018-2020 | 4 | 2 | .667 | 2.10 | 40 | 0 | 0 | 0 | 4 | 60.0 | 44 | 14 | 4 | 20 | 60 |
| Tanner Jones | 2025-2025 | 2 | 2 | .500 | 8.71 | 32 | 1 | 0 | 0 | 2 | 71.1 | 98 | 69 | 29 | 45 | 56 |
| Zachary Jones | 2018-2019 | 4 | 3 | .571 | 4.35 | 50 | 1 | 0 | 0 | 1 | 82.2 | 68 | 40 | 7 | 55 | 100 |
| Mitchell Jordan | 2019-2021 | 0 | 0 | .000 | 6.75 | 6 | 3 | 0 | 0 | 0 | 16.0 | 21 | 12 | 1 | 15 | 13 |
| Zach Joyce | 2023-2023 | 0 | 1 | .000 | 2.70 | 11 | 0 | 0 | 0 | 1 | 10.0 | 9 | 3 | 0 | 3 | 9 |
| Jorge Juan | 2024-2024 | 8 | 11 | .421 | 6.46 | 28 | 28 | 0 | 0 | 0 | 118.1 | 109 | 85 | 16 | 129 | 137 |
| Gage Jump | 2025-2025 | 5 | 10 | .333 | 6.91 | 21 | 21 | 0 | 0 | 0 | 99.0 | 118 | 76 | 17 | 56 | 87 |
| Ariel Jurado | 2020-2020 | 6 | 1 | .857 | 3.75 | 8 | 8 | 1 | 0 | 0 | 48.0 | 55 | 20 | 6 | 10 | 30 |
