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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 |
|---|---|---|---|---|---|---|---|---|---|
| Alec Jackson | 2035-2035 | .000 | 0 | 0 | 1 | 0 | 1 | 2.40 | 28 |
| Ben Jackson | 2024-2024 | .000 | 0 | 0 | 3 | 6 | 0 | 7.78 | 35 |
| Brad Jackson | 2031-2033 | .174 | 1 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Chris Jackson | 2035-2035 | .000 | 0 | 0 | 5 | 6 | 2 | 4.63 | 76 |
| Donald Jackson | 2033-2035 | .000 | 0 | 0 | 8 | 7 | 0 | 3.63 | 110 |
| John Jackson | 2025-2025 | .000 | 0 | 0 | 7 | 5 | 0 | 3.68 | 88 |
| John Jackson | 2017-2029 | .271 | 68 | 378 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Jackson | 2018-2026 | .000 | 0 | 0 | 10 | 11 | 0 | 4.56 | 157 |
| Phil Jackson | 2032-2035 | .231 | 2 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Sonny Jackson | 2030-2030 | .214 | 1 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Steven Jackson | 2013-2017 | .308 | 23 | 118 | 0 | 0 | 0 | 0.00 | 0 |
| Bryan Jacobs | 2033-2035 | .000 | 0 | 0 | 11 | 9 | 3 | 4.98 | 210 |
| John Jacobs | 2019-2019 | .250 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Manuel Jaimes | 2025-2031 | .312 | 51 | 268 | 0 | 0 | 0 | 0.00 | 0 |
| Matthew James | 2030-2035 | .271 | 56 | 259 | 0 | 0 | 0 | 0.00 | 0 |
| Wayne James | 2023-2027 | .256 | 5 | 72 | 0 | 0 | 0 | 0.00 | 0 |
| Floyd Janik | 2014-2014 | .000 | 0 | 0 | 11 | 11 | 0 | 3.42 | 134 |
| Jorge Jaquez | 2015-2021 | .308 | 47 | 232 | 0 | 0 | 0 | 0.00 | 0 |
| Jesús Jaramillo | 2034-2034 | .260 | 5 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Miguel Jaramillo | 2030-2035 | .000 | 0 | 0 | 32 | 40 | 0 | 4.64 | 392 |
| Hemmuc Jefar | 2021-2028 | .281 | 17 | 147 | 0 | 0 | 0 | 0.00 | 0 |
| Tim Jefferson | 2029-2030 | .000 | 0 | 0 | 0 | 7 | 0 | 8.29 | 32 |
| John Jellison | 2014-2017 | .244 | 4 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Greg Jenkins | 2024-2025 | .000 | 0 | 0 | 20 | 16 | 0 | 4.23 | 260 |
| Joe Jenkins | 2033-2034 | .279 | 5 | 50 | 0 | 0 | 0 | 0.00 | 0 |
| John Jenkins | 2024-2027 | .225 | 6 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Kieran Jenkins | 2029-2035 | .000 | 0 | 0 | 19 | 18 | 0 | 3.98 | 321 |
| Patrick Jennings | 2034-2034 | .212 | 1 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Glenn Jensen | 2018-2023 | .230 | 1 | 20 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jiménez | 2035-2035 | .223 | 0 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Vicente Jiménez | 2025-2029 | .258 | 12 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Tommy Johns | 2021-2030 | .284 | 7 | 136 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Johnson | 2031-2033 | .280 | 4 | 29 | 0 | 0 | 0 | 0.00 | 0 |
| Errol Johnson | 2034-2034 | .000 | 0 | 0 | 1 | 0 | 0 | 6.35 | 7 |
| Frank Johnson | 2020-2025 | .247 | 6 | 83 | 0 | 0 | 0 | 0.00 | 0 |
| Gary Johnson | 2033-2033 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Harry Johnson | 2014-2016 | .000 | 0 | 0 | 2 | 3 | 4 | 2.65 | 51 |
| Joe Johnson | 2035-2035 | .235 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Justin Johnson | 2022-2027 | .283 | 25 | 186 | 0 | 0 | 0 | 0.00 | 0 |
| Nicholas Johnson | 2013-2015 | .193 | 9 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Stan Johnson | 2034-2035 | .210 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Arthur Johnston | 2031-2031 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Dave Johnston | 2018-2021 | .256 | 5 | 74 | 0 | 0 | 0 | 0.00 | 0 |
| James Johnstone | 2014-2018 | .240 | 15 | 95 | 0 | 0 | 0 | 0.00 | 0 |
| Cullen Jones | 2022-2027 | .000 | 0 | 0 | 34 | 28 | 1 | 4.83 | 393 |
| Don Jones | 2033-2035 | .000 | 0 | 0 | 12 | 13 | 0 | 4.10 | 160 |
| Don Jones | 2028-2028 | .330 | 8 | 32 | 0 | 0 | 0 | 0.00 | 0 |
| Ed Jones | 2025-2029 | .270 | 3 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Fred Jones | 2013-2020 | .167 | 0 | 1 | 53 | 45 | 0 | 3.84 | 466 |
| Glenn Jones | 2025-2029 | .000 | 0 | 0 | 10 | 15 | 40 | 4.33 | 62 |
| Jason Jones | 2032-2033 | .000 | 0 | 0 | 1 | 0 | 1 | 5.70 | 21 |
| Jeff Jones | 2023-2027 | .330 | 70 | 411 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jones | 2026-2032 | .000 | 0 | 0 | 25 | 49 | 6 | 4.89 | 435 |
| Ricky Jones | 2033-2035 | .297 | 1 | 87 | 0 | 0 | 0 | 0.00 | 0 |
| Roger Jones | 2020-2021 | .474 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Scott Jones | 2035-2035 | .193 | 2 | 22 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Jones | 2019-2020 | .304 | 9 | 71 | 0 | 0 | 0 | 0.00 | 0 |
| Von Jones | 2030-2033 | .312 | 2 | 126 | 0 | 0 | 0 | 0.00 | 0 |
| Walt Jones | 2032-2034 | .234 | 3 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Collin Jordan | 2030-2031 | .000 | 0 | 0 | 1 | 2 | 1 | 6.00 | 21 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Salvador Jordan | 2021-2022 | .000 | 0 | 0 | 9 | 18 | 0 | 5.80 | 110 |
| Dale Joseph | 2026-2032 | .255 | 53 | 219 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Joseph | 2023-2025 | .000 | 0 | 0 | 11 | 9 | 1 | 5.61 | 107 |
| Eisuke Jouda | 2019-2022 | .176 | 4 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Katsuhiko Jouda | 2020-2033 | .311 | 13 | 75 | 0 | 0 | 0 | 0.00 | 0 |
| Yunosuke Jouon | 2034-2035 | .000 | 0 | 0 | 14 | 16 | 0 | 3.40 | 187 |
| Arlen Jr. | 2035-2035 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Josias Juarez | 2014-2014 | .375 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Christian June | 2014-2016 | .000 | 0 | 0 | 13 | 46 | 0 | 6.38 | 104 |
| Razan Juro | 2013-2022 | .229 | 20 | 110 | 0 | 0 | 0 | 0.00 | 0 |
| Basil Justiz | 2014-2017 | .233 | 15 | 70 | 0 | 0 | 0 | 0.00 | 0 |
