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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Greg Jacknewitz | 2019-2020 | .000 | 0 | 0 | 2 | 6 | 0 | 9.40 | 23 |
| Andre Jackson | 2020-2021 | .000 | 0 | 0 | 3 | 2 | 0 | 4.74 | 75 |
| Jeremiah Jackson | 2019-2020 | .318 | 15 | 87 | 0 | 0 | 0 | 0.00 | 0 |
| Alek Jacob | 2022-2024 | .000 | 0 | 0 | 4 | 13 | 18 | 5.10 | 81 |
| David Jacob | 2018-2025 | .298 | 20 | 102 | 0 | 0 | 0 | 0.00 | 0 |
| Tanner Jacobson | 2024-2024 | .000 | 0 | 0 | 1 | 1 | 0 | 4.74 | 16 |
| Eric Jagielo | 2016-2016 | .375 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| David Jagoditsh | 2013-2017 | .000 | 0 | 0 | 5 | 16 | 2 | 7.37 | 149 |
| Mac James | 2017-2023 | .286 | 44 | 267 | 0 | 0 | 0 | 32.40 | 3 |
| Hyun-seok Jang | 2024-2024 | .000 | 0 | 0 | 0 | 1 | 0 | 2.25 | 19 |
| Thomas Jankins | 2018-2023 | .000 | 0 | 0 | 0 | 2 | 0 | 14.82 | 31 |
| Ryan January | 2020-2024 | .215 | 26 | 114 | 0 | 1 | 0 | 21.00 | 1 |
| Griffin Jax | 2017-2018 | .000 | 0 | 0 | 0 | 5 | 0 | 11.43 | 51 |
| Tyler Jay | 2019-2021 | .000 | 0 | 0 | 4 | 2 | 6 | 4.11 | 58 |
| Myles Jaye | 2018-2019 | .000 | 0 | 0 | 8 | 6 | 3 | 5.62 | 73 |
| Ryan Jeffers | 2019-2019 | .306 | 5 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Jefferson | 2013-2013 | .000 | 0 | 0 | 4 | 16 | 0 | 7.09 | 103 |
| Liam Jenkins | 2023-2023 | .000 | 0 | 0 | 1 | 1 | 0 | 14.79 | 6 |
| Chase Jensen | 2015-2015 | .167 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Jensen | 2021-2022 | .000 | 0 | 0 | 6 | 7 | 0 | 5.22 | 109 |
| Kevin Jepsen | 2017-2017 | .000 | 0 | 0 | 4 | 0 | 1 | 2.20 | 86 |
| Williams Jerez | 2014-2021 | .244 | 15 | 75 | 13 | 5 | 9 | 3.54 | 194 |
| Brody Jessee | 2024-2025 | .000 | 0 | 0 | 3 | 3 | 1 | 6.87 | 96 |
| Luke Jewett | 2025-2025 | .000 | 0 | 0 | 4 | 2 | 2 | 6.11 | 56 |
| Carlos Jimenez | 2024-2024 | .295 | 3 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Carlos Jimenez | 2024-2025 | .000 | 0 | 0 | 4 | 1 | 0 | 8.82 | 74 |
| Eddie Jimenez | 2021-2021 | .000 | 0 | 0 | 2 | 1 | 0 | 2.76 | 26 |
| Joe Jimenez | 2017-2021 | .000 | 0 | 0 | 5 | 2 | 23 | 3.09 | 79 |
| Leonardo Jimenez | 2022-2022 | .303 | 8 | 48 | 0 | 0 | 0 | 0.00 | 0 |
| Johendi Jiminian | 2015-2015 | .000 | 0 | 0 | 4 | 8 | 0 | 5.61 | 109 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Ulises Joaquin | 2016-2016 | .000 | 0 | 0 | 0 | 0 | 1 | 5.81 | 53 |
| Brayden Jobert | 2024-2025 | .235 | 12 | 64 | 0 | 0 | 0 | 0.00 | 0 |
| Boby Johnson | 2022-2024 | .000 | 0 | 0 | 5 | 4 | 9 | 3.29 | 84 |
| Brandon Johnson | 2024-2024 | .000 | 0 | 0 | 5 | 4 | 0 | 6.83 | 56 |
| Ivan Johnson | 2021-2021 | .227 | 3 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Jacob Johnson | 2014-2015 | .000 | 0 | 0 | 11 | 3 | 2 | 6.64 | 169 |
| Jared Johnson | 2024-2025 | .000 | 0 | 0 | 3 | 7 | 1 | 5.80 | 97 |
| Justin Johnson | 2024-2025 | .266 | 4 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Kyle Johnson | 2013-2013 | .251 | 1 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| MD Johnson | 2022-2022 | .000 | 0 | 0 | 2 | 1 | 0 | 3.79 | 24 |
| Michael Johnson | 2017-2017 | .000 | 0 | 0 | 0 | 1 | 0 | 8.22 | 14 |
| Pierce Johnson | 2019-2019 | .000 | 0 | 0 | 6 | 0 | 2 | 3.54 | 71 |
| Sherman Johnson | 2013-2015 | .256 | 26 | 137 | 0 | 0 | 0 | 0.00 | 0 |
| Stephen Johnson | 2018-2019 | .000 | 0 | 0 | 4 | 2 | 0 | 17.56 | 21 |
| Kyle Johnston | 2023-2023 | .000 | 0 | 0 | 5 | 1 | 9 | 2.23 | 46 |
| Will Johnston | 2025-2025 | .000 | 0 | 0 | 2 | 0 | 0 | 3.66 | 16 |
| Alonzo Jones | 2020-2020 | .255 | 3 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| Bradley Jones | 2018-2023 | .292 | 17 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Brock Jones | 2025-2025 | .500 | 0 | 0 | 3 | 3 | 2 | 8.68 | 31 |
| Charles Jones | 2013-2016 | .249 | 22 | 94 | 0 | 0 | 0 | 0.00 | 0 |
| Cody Jones | 2018-2018 | .258 | 7 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Cory Jones | 2016-2017 | .000 | 0 | 0 | 7 | 4 | 0 | 5.54 | 92 |
| Druw Jones | 2024-2024 | .266 | 5 | 18 | 0 | 0 | 0 | 0.00 | 0 |
| Hunter Jones | 2013-2013 | .062 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Jacoby Jones | 2016-2016 | .258 | 9 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2019-2019 | .390 | 2 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Kyle Jones | 2025-2025 | .000 | 0 | 0 | 5 | 7 | 0 | 7.69 | 71 |
| Lance Jones | 2016-2019 | .263 | 7 | 21 | 0 | 0 | 0 | 0.00 | 0 |
| Mylz Jones | 2016-2021 | .269 | 20 | 120 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Jones | 2024-2024 | .000 | 0 | 0 | 1 | 2 | 8 | 5.49 | 20 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Spencer Jones | 2023-2023 | .327 | 0 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Spencer Jones | 2018-2020 | .000 | 0 | 0 | 4 | 2 | 4 | 2.10 | 60 |
| Tanner Jones | 2025-2025 | .000 | 0 | 0 | 2 | 2 | 1 | 8.60 | 43 |
| Zachary Jones | 2018-2019 | .000 | 0 | 0 | 4 | 3 | 1 | 4.35 | 100 |
| Keith Jones II | 2025-2025 | .257 | 11 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| Blaze Jordan | 2023-2023 | .262 | 2 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Dakota Jordan | 2025-2025 | .291 | 4 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Mitchell Jordan | 2019-2021 | .000 | 0 | 0 | 0 | 0 | 0 | 6.75 | 13 |
| Carlos Jorge | 2025-2025 | .327 | 12 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Zach Joyce | 2023-2023 | .000 | 0 | 0 | 0 | 1 | 1 | 2.70 | 9 |
| Jorge Juan | 2024-2024 | .000 | 0 | 0 | 8 | 11 | 0 | 6.46 | 137 |
| Gage Jump | 2025-2025 | .000 | 0 | 0 | 3 | 10 | 0 | 8.28 | 69 |
| Josh Jung | 2020-2020 | .290 | 6 | 55 | 0 | 0 | 0 | 0.00 | 0 |
| Ariel Jurado | 2020-2020 | .000 | 0 | 0 | 6 | 1 | 0 | 3.75 | 30 |
