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| "J" Pitching Register | |
| Batting Register | Pitching Glossary |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| Jim Jacks | 2028-2028 | 0 | 1 | .000 | 54.55 | 1 | 1 | 0 | 0 | 0 | 0.3 | 5 | 2 | 1 | 1 | 0 | 0.0 |
| Eric Jackson | 2025-2029 | 19 | 43 | .306 | 5.07 | 85 | 83 | 3 | 2 | 0 | 486.7 | 501 | 274 | 57 | 202 | 272 | 9.6 |
| Matthew Jackson | 2028-2029 | 6 | 6 | .500 | 5.43 | 52 | 11 | 1 | 0 | 3 | 104.3 | 124 | 63 | 20 | 27 | 38 | 2.7 |
| Alan Jacobs | 2022-2029 | 36 | 30 | .545 | 3.09 | 589 | 0 | 0 | 0 | 160 | 612.0 | 583 | 210 | 23 | 182 | 324 | 79.9 |
| David James | 2011-2011 | 1 | 0 | 1.000 | 0.00 | 1 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 2 | 1 | 0.3 |
| Paydirt James | 2027-2029 | 23 | 18 | .561 | 3.93 | 124 | 37 | 0 | 0 | 1 | 339.3 | 269 | 148 | 49 | 176 | 285 | 19.5 |
| Lee Jarboe | 2000-2010 | 31 | 47 | .397 | 4.01 | 541 | 4 | 0 | 0 | 18 | 616.6 | 615 | 275 | 73 | 183 | 340 | 35.3 |
| Kenneth Jarvis | 2000-2001 | 0 | 1 | .000 | 109.09 | 1 | 0 | 0 | 0 | 0 | 0.3 | 4 | 4 | 1 | 0 | 0 | 0.0 |
| James Jason | 2019-2023 | 16 | 23 | .410 | 4.72 | 118 | 50 | 0 | 0 | 2 | 333.7 | 394 | 175 | 37 | 132 | 136 | 9.6 |
| Salvador Jimenez | 2012-2012 | 0 | 0 | .000 | 4.50 | 2 | 0 | 0 | 0 | 2 | 2.0 | 3 | 1 | 0 | 0 | 1 | 0.2 |
| Monte Jobson | 2011-2019 | 12 | 31 | .279 | 5.33 | 178 | 32 | 0 | 0 | 4 | 363.3 | 380 | 215 | 48 | 172 | 141 | 5.0 |
| Robert John | 2000-2005 | 22 | 24 | .478 | 3.29 | 292 | 2 | 0 | 0 | 86 | 320.3 | 271 | 117 | 35 | 100 | 169 | 43.9 |
| Gerald Johnson | 2000-2005 | 29 | 43 | .403 | 4.36 | 105 | 86 | 13 | 2 | 0 | 605.3 | 579 | 293 | 117 | 136 | 337 | 23.7 |
| Kurtis Johnson | 2000-2006 | 61 | 70 | .466 | 3.81 | 199 | 184 | 15 | 5 | 1 | 1216.6 | 1181 | 515 | 96 | 569 | 889 | 48.5 |
| Doug Johnstone | 2022-2029 | 26 | 24 | .520 | 4.41 | 518 | 0 | 0 | 0 | 39 | 628.0 | 552 | 308 | 61 | 384 | 434 | 39.9 |
| Mats Johnston | 2019-2029 | 53 | 45 | .541 | 3.65 | 194 | 125 | 4 | 4 | 0 | 879.3 | 826 | 357 | 98 | 224 | 441 | 54.9 |
| Josito Joleno | 2011-2015 | 0 | 1 | .000 | 8.44 | 2 | 1 | 0 | 0 | 0 | 5.3 | 6 | 5 | 1 | 4 | 0 | 0.3 |
| Byron Jones | 2020-2020 | 0 | 2 | .000 | 27.00 | 3 | 0 | 0 | 0 | 0 | 2.0 | 7 | 6 | 0 | 2 | 2 | 0.0 |
| Ernest Jones | 2016-2018 | 1 | 7 | .125 | 4.95 | 135 | 0 | 0 | 0 | 2 | 132.7 | 137 | 73 | 8 | 63 | 45 | 4.3 |
| Franklin Jones | 2007-2016 | 34 | 35 | .493 | 4.18 | 584 | 0 | 0 | 0 | 20 | 646.0 | 685 | 300 | 73 | 228 | 313 | 31.1 |
| Larry Jones | 2019-2028 | 38 | 29 | .567 | 4.11 | 464 | 0 | 0 | 0 | 31 | 525.3 | 531 | 240 | 46 | 188 | 222 | 31.4 |
| Robert Jones | 2002-2009 | 43 | 84 | .339 | 4.52 | 170 | 159 | 17 | 3 | 0 | 1044.3 | 1099 | 525 | 131 | 491 | 417 | 25.1 |
| Xavier Josephs | 2003-2018 | 150 | 160 | .484 | 3.38 | 478 | 433 | 38 | 13 | 3 | 2994.6 | 2611 | 1125 | 339 | 637 | 2023 | 180.0 |
| Cedric Joubert | 2015-2027 | 16 | 26 | .381 | 4.53 | 350 | 5 | 0 | 0 | 26 | 421.3 | 443 | 212 | 41 | 200 | 140 | 20.0 |
| John Joyce | 2026-2029 | 19 | 14 | .576 | 4.87 | 140 | 21 | 0 | 0 | 11 | 273.7 | 307 | 148 | 35 | 117 | 95 | 11.9 |
| Jeff Joyner | 2028-2029 | 4 | 5 | .444 | 6.31 | 10 | 10 | 0 | 0 | 0 | 55.7 | 72 | 39 | 8 | 25 | 12 | 0.6 |
| Linwood Judy | 2004-2017 | 57 | 64 | .471 | 3.49 | 1015 | 0 | 0 | 0 | 182 | 1054.3 | 819 | 409 | 111 | 336 | 784 | 112.7 |
| Roosevelt Juncker | 2015-2015 | 0 | 0 | .000 | 3.86 | 2 | 0 | 0 | 0 | 0 | 2.3 | 2 | 1 | 1 | 1 | 1 | 0.1 |
| Hoya Jung | 2000-2009 | 62 | 99 | .385 | 4.53 | 312 | 197 | 19 | 2 | 1 | 1462.6 | 1334 | 737 | 143 | 776 | 807 | 39.1 |
| Robert Jung | 2003-2010 | 0 | 1 | .000 | 10.13 | 5 | 0 | 0 | 0 | 0 | 5.3 | 9 | 6 | 2 | 3 | 3 | 0.0 |
| Player | From-To | W | L | Pct | ERA | G | GS | CG | SHO | SV | IP | H | ER | HR | BB | SO | PWS |
| Tatsushi Junnosuke | 2000-2001 | 6 | 13 | .316 | 4.24 | 131 | 0 | 0 | 0 | 5 | 155.0 | 173 | 73 | 20 | 50 | 94 | 6.9 |
| Alfredo Jurez | 2023-2029 | 35 | 24 | .593 | 2.92 | 485 | 0 | 0 | 0 | 132 | 487.3 | 417 | 158 | 19 | 162 | 325 | 74.7 |
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