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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barrett Jackson | 2026-2027 | 1 | 0 | 1.000 | 1.40 | 13 | 0 | 0 | 0 | 2 | 25.2 | 25 | 4 | 0 | 11 | 20 |
| Brit Jackson | 2014-2021 | 2 | 3 | .400 | 2.55 | 52 | 0 | 0 | 0 | 1 | 74.0 | 55 | 21 | 6 | 23 | 78 |
| Bryan Jackson | 2016-2022 | 50 | 34 | .595 | 4.69 | 192 | 108 | 4 | 2 | 2 | 749.2 | 734 | 391 | 102 | 334 | 668 |
| Kevin Jackson | 2018-2025 | 4 | 7 | .364 | 5.23 | 183 | 0 | 0 | 0 | 11 | 228.2 | 227 | 133 | 25 | 153 | 150 |
| Mike Jackson | 2017-2021 | 8 | 3 | .727 | 4.93 | 113 | 0 | 0 | 0 | 5 | 122.1 | 103 | 67 | 20 | 100 | 200 |
| Pat Jackson | 2027-2027 | 3 | 4 | .429 | 4.85 | 10 | 10 | 1 | 0 | 0 | 55.2 | 59 | 30 | 10 | 26 | 28 |
| John Jacobs | 2020-2021 | 6 | 8 | .429 | 2.80 | 97 | 0 | 0 | 0 | 57 | 93.1 | 70 | 29 | 6 | 41 | 90 |
| Johnny Jacobs | 2021-2027 | 27 | 25 | .519 | 3.82 | 335 | 0 | 0 | 0 | 50 | 348.1 | 326 | 148 | 24 | 150 | 306 |
| Jeffery James | 2018-2019 | 10 | 8 | .556 | 4.49 | 134 | 0 | 0 | 0 | 5 | 110.1 | 98 | 55 | 12 | 80 | 116 |
| Jerry James | 2022-2024 | 1 | 0 | 1.000 | 8.15 | 31 | 0 | 0 | 0 | 0 | 49.2 | 72 | 45 | 7 | 45 | 43 |
| Ray Jefferson | 2020-2021 | 3 | 10 | .231 | 7.63 | 21 | 21 | 0 | 0 | 0 | 102.2 | 138 | 87 | 14 | 71 | 77 |
| Ai-de Jen | 2020-2022 | 3 | 2 | .600 | 3.51 | 65 | 0 | 0 | 0 | 7 | 82.0 | 75 | 32 | 8 | 27 | 74 |
| Patrick Jenkins | 2014-2021 | 13 | 11 | .542 | 5.65 | 198 | 0 | 0 | 0 | 2 | 245.1 | 293 | 154 | 40 | 89 | 231 |
| Ryan Jenkins | 2019-2026 | 28 | 41 | .406 | 4.91 | 111 | 109 | 2 | 2 | 0 | 614.0 | 664 | 335 | 68 | 199 | 439 |
| Tom Jerome | 2021-2021 | 1 | 1 | .500 | 8.53 | 9 | 0 | 0 | 0 | 0 | 12.2 | 13 | 12 | 1 | 9 | 8 |
| Rafael Jiménez | 2027-2027 | 0 | 2 | .000 | 5.40 | 14 | 0 | 0 | 0 | 0 | 15.0 | 12 | 9 | 0 | 17 | 22 |
| Kennan Johannson | 2020-2020 | 1 | 0 | 1.000 | 6.75 | 5 | 0 | 0 | 0 | 0 | 10.2 | 12 | 8 | 1 | 7 | 5 |
| Cutter John | 2017-2020 | 16 | 9 | .640 | 4.20 | 242 | 2 | 0 | 0 | 7 | 326.0 | 340 | 152 | 40 | 129 | 280 |
| Chris Johnson | 2022-2026 | 23 | 25 | .479 | 5.13 | 113 | 69 | 0 | 0 | 7 | 468.1 | 507 | 267 | 41 | 294 | 387 |
| Patrick Johnson | 2024-2027 | 6 | 10 | .375 | 3.87 | 119 | 13 | 1 | 1 | 9 | 227.2 | 239 | 98 | 20 | 129 | 187 |
| Steve Johnson | 2022-2022 | 0 | 0 | .000 | 8.50 | 13 | 0 | 0 | 0 | 0 | 18.0 | 32 | 17 | 4 | 10 | 17 |
| Tanner Johnson | 2024-2024 | 1 | 0 | 1.000 | 3.38 | 2 | 2 | 0 | 0 | 0 | 13.1 | 16 | 5 | 0 | 3 | 12 |
| Todd Johnson | 2012-2026 | 23 | 13 | .639 | 3.51 | 261 | 3 | 0 | 0 | 26 | 338.0 | 327 | 132 | 44 | 111 | 397 |
| Bob Johnston | 2027-2027 | 7 | 10 | .412 | 5.26 | 33 | 24 | 1 | 0 | 0 | 150.2 | 175 | 88 | 17 | 70 | 112 |
| Jason Johnston | 2018-2025 | 33 | 28 | .541 | 4.66 | 442 | 1 | 0 | 0 | 12 | 619.1 | 645 | 321 | 84 | 274 | 625 |
| Paul Johnston | 2026-2027 | 10 | 7 | .588 | 4.80 | 31 | 31 | 1 | 0 | 0 | 172.2 | 202 | 92 | 13 | 53 | 164 |
| Paul Johnston | 2014-2025 | 8 | 11 | .421 | 4.04 | 24 | 23 | 0 | 0 | 0 | 156.0 | 151 | 70 | 12 | 63 | 103 |
| Steve Johnston | 2016-2023 | 62 | 72 | .463 | 5.35 | 256 | 156 | 3 | 1 | 3 | 1110.0 | 1136 | 660 | 141 | 598 | 1002 |
| Jordan Johnstone | 2013-2020 | 53 | 62 | .461 | 4.90 | 179 | 158 | 2 | 0 | 1 | 934.1 | 977 | 509 | 73 | 550 | 694 |
| Daniel Jones | 2012-2019 | 24 | 34 | .414 | 5.16 | 156 | 75 | 1 | 0 | 3 | 528.1 | 564 | 303 | 60 | 271 | 442 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO |
| Harvey Jones | 2013-2019 | 17 | 12 | .586 | 3.94 | 238 | 0 | 0 | 0 | 10 | 258.0 | 240 | 113 | 30 | 100 | 290 |
| John Jones | 2017-2026 | 2 | 3 | .400 | 6.00 | 58 | 0 | 0 | 0 | 7 | 63.0 | 91 | 42 | 7 | 33 | 49 |
| Leonard Jones | 2019-2022 | 2 | 0 | 1.000 | 6.00 | 36 | 0 | 0 | 0 | 3 | 30.0 | 32 | 20 | 4 | 22 | 34 |
| Mike Jones | 2015-2021 | 16 | 13 | .552 | 5.05 | 272 | 0 | 0 | 0 | 5 | 363.1 | 364 | 204 | 46 | 236 | 410 |
| Ron Jones | 2020-2023 | 3 | 2 | .600 | 4.59 | 55 | 0 | 0 | 0 | 0 | 80.1 | 79 | 41 | 8 | 83 | 64 |
| Kuang-an Joo | 2026-2027 | 2 | 6 | .250 | 3.49 | 119 | 0 | 0 | 0 | 30 | 113.1 | 74 | 44 | 12 | 78 | 181 |
| Keiji Jouon | 2015-2016 | 3 | 8 | .273 | 3.38 | 86 | 0 | 0 | 0 | 38 | 80.0 | 66 | 30 | 7 | 40 | 89 |
| Ye-qing Jue | 2024-2026 | 3 | 1 | .750 | 6.97 | 70 | 0 | 0 | 0 | 6 | 100.2 | 135 | 78 | 14 | 61 | 73 |
| Ling-lai Jung | 2025-2025 | 1 | 1 | .500 | 20.65 | 6 | 0 | 0 | 0 | 0 | 5.2 | 12 | 13 | 1 | 7 | 3 |
| Loeck Jurgens | 2023-2027 | 26 | 19 | .578 | 4.38 | 73 | 73 | 0 | 0 | 0 | 384.1 | 405 | 187 | 49 | 112 | 356 |
