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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 |
|---|---|---|---|---|---|---|---|---|---|
| Colm Jackman | 2022-2027 | .248 | 32 | 210 | 0 | 0 | 0 | 0.00 | 0 |
| Allan Jackson | 2016-2017 | .293 | 19 | 80 | 0 | 0 | 0 | 0.00 | 0 |
| Barrett Jackson | 2024-2025 | .000 | 0 | 0 | 4 | 6 | 22 | 4.12 | 84 |
| Brit Jackson | 2019-2019 | .000 | 0 | 0 | 5 | 0 | 4 | 1.63 | 97 |
| Bryan Jackson | 2012-2015 | .000 | 0 | 0 | 13 | 8 | 0 | 3.09 | 148 |
| Carlton Jackson | 2025-2028 | .269 | 24 | 130 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Jackson | 2017-2021 | .000 | 0 | 0 | 7 | 4 | 5 | 2.65 | 117 |
| Leon Jackson | 2025-2028 | .195 | 0 | 18 | 0 | 0 | 0 | 0.00 | 0 |
| Mike Jackson | 2012-2019 | .000 | 0 | 0 | 14 | 9 | 13 | 2.23 | 382 |
| Pat Jackson | 2025-2027 | .000 | 0 | 0 | 3 | 5 | 1 | 3.61 | 107 |
| Ron Jackson | 2027-2028 | .000 | 0 | 0 | 3 | 2 | 2 | 2.33 | 129 |
| Coy Jacobs | 2021-2022 | .308 | 23 | 76 | 0 | 0 | 0 | 0.00 | 0 |
| John Jacobs | 2018-2018 | .000 | 0 | 0 | 1 | 2 | 17 | 1.57 | 35 |
| Johnny Jacobs | 2017-2018 | .000 | 0 | 0 | 3 | 9 | 14 | 4.60 | 67 |
| Eddy Jacobse | 2022-2022 | .288 | 3 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| David Jacobson | 2025-2026 | .236 | 10 | 57 | 0 | 0 | 0 | 0.00 | 0 |
| Nathan Jacobson | 2027-2028 | .216 | 13 | 57 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Jacobson | 2015-2015 | .278 | 10 | 121 | 0 | 0 | 0 | 0.00 | 0 |
| Jules Jacquemin | 2026-2028 | .000 | 0 | 0 | 2 | 0 | 0 | 5.19 | 49 |
| Stéphane Jacquemin | 2025-2028 | .313 | 8 | 59 | 0 | 0 | 0 | 0.00 | 0 |
| Younis Jahangiri | 2024-2028 | .000 | 0 | 0 | 7 | 3 | 21 | 2.22 | 236 |
| Mike Jahn | 2020-2028 | .284 | 17 | 101 | 0 | 0 | 0 | 0.00 | 0 |
| Jeffery James | 2015-2020 | .000 | 0 | 0 | 5 | 8 | 18 | 5.87 | 115 |
| Jerry James | 2018-2023 | .000 | 0 | 0 | 20 | 17 | 13 | 3.74 | 329 |
| Jim James | 2027-2028 | .239 | 11 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Steve James | 2018-2018 | .274 | 5 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Johannes Jancke | 2026-2027 | .293 | 7 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Virgil Janse | 2028-2028 | .000 | 0 | 0 | 8 | 2 | 1 | 5.31 | 40 |
| Flip Janssen | 2025-2025 | .000 | 0 | 0 | 0 | 0 | 0 | 3.38 | 0 |
| Freek Janszen | 2025-2026 | .000 | 0 | 0 | 2 | 2 | 3 | 1.98 | 69 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Claudio Jaramillo | 2014-2020 | .213 | 12 | 90 | 0 | 0 | 0 | 0.00 | 0 |
| Joaquín Jaramillo | 2020-2024 | .269 | 9 | 74 | 0 | 0 | 0 | 0.00 | 0 |
| José Jaramillo | 2013-2014 | .250 | 11 | 46 | 0 | 0 | 0 | 0.00 | 0 |
| Juan Jaramillo | 2024-2024 | .321 | 3 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Bhavsar Jayasurya | 2021-2028 | .264 | 43 | 171 | 0 | 0 | 0 | 0.00 | 0 |
| Frank Jayne | 2020-2021 | .000 | 0 | 0 | 3 | 8 | 1 | 7.15 | 68 |
| Henry Jeavons | 2026-2028 | .227 | 6 | 57 | 0 | 0 | 0 | 0.00 | 0 |
| Ray Jefferson | 2017-2018 | .000 | 0 | 0 | 10 | 10 | 0 | 4.55 | 166 |
| Geoffrey Jellineck | 2017-2017 | .283 | 13 | 76 | 0 | 0 | 0 | 0.00 | 0 |
| Ai-de Jen | 2018-2020 | .000 | 0 | 0 | 8 | 1 | 3 | 3.98 | 128 |
| Martin Jenkins | 2017-2018 | .273 | 9 | 113 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Jenkins | 2027-2027 | .293 | 9 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Jenkins | 2012-2018 | .000 | 0 | 0 | 7 | 6 | 15 | 2.39 | 148 |
| Ryan Jenkins | 2016-2026 | .000 | 0 | 0 | 25 | 13 | 0 | 2.62 | 305 |
| Paolo Jens | 2027-2028 | .000 | 0 | 0 | 11 | 7 | 1 | 4.45 | 152 |
| Ross Jephson | 2022-2023 | .273 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jeremy | 2025-2026 | .302 | 7 | 39 | 0 | 0 | 0 | 0.00 | 0 |
| Stephen Jerram | 2022-2023 | .333 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Randall Jervis | 2028-2028 | .255 | 3 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Paul Jesso | 2019-2020 | .229 | 9 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Matthew Jesty | 2027-2028 | .222 | 9 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| Vic Jevons | 2023-2025 | .290 | 3 | 14 | 0 | 0 | 0 | 0.00 | 0 |
| Aaron Jewell | 2014-2019 | .000 | 0 | 0 | 37 | 22 | 0 | 3.34 | 581 |
| Lawrence Jewers | 2017-2018 | .269 | 13 | 123 | 0 | 0 | 0 | 0.00 | 0 |
| Pang Ji | 2026-2028 | .000 | 0 | 0 | 13 | 16 | 2 | 3.76 | 476 |
| Ah-cy Jian | 2028-2028 | .000 | 0 | 0 | 0 | 4 | 1 | 3.58 | 42 |
| Hoo-gwo Jianbua | 2021-2021 | .194 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Xue-liang Jianbua | 2026-2026 | .000 | 0 | 0 | 0 | 1 | 0 | 4.70 | 38 |
| Kai-ge Jiao | 2027-2028 | .000 | 0 | 0 | 10 | 10 | 0 | 4.76 | 157 |
| Su-wu Jiao | 2027-2028 | .260 | 5 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Wei-hong Jiao | 2024-2025 | .223 | 6 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Gilberto Jiménez | 2020-2022 | .311 | 42 | 178 | 0 | 0 | 0 | 0.00 | 0 |
| Jorge Jiménez | 2016-2028 | .265 | 39 | 242 | 0 | 0 | 0 | 0.00 | 0 |
| José Jiménez | 2022-2026 | .303 | 3 | 39 | 0 | 0 | 0 | 0.00 | 0 |
| Paco Jiménez | 2023-2024 | .284 | 20 | 72 | 0 | 0 | 0 | 0.00 | 0 |
| Pepe Jiménez | 2022-2028 | .000 | 0 | 0 | 7 | 9 | 5 | 4.55 | 334 |
| Rafael Jiménez | 2022-2027 | .000 | 0 | 0 | 11 | 9 | 37 | 3.62 | 257 |
| Ramón Jiménez | 2014-2020 | .000 | 0 | 0 | 11 | 10 | 14 | 3.64 | 254 |
| Kun Jing | 2028-2028 | .000 | 0 | 0 | 4 | 1 | 0 | 3.95 | 39 |
| Enreecko Jocson | 2028-2028 | .050 | 0 | 2 | 0 | 0 | 0 | 0.00 | 0 |
| Hai-dong Joe | 2027-2027 | .419 | 1 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Sun Joe | 2022-2025 | .199 | 1 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Zheng-ze Joe | 2026-2028 | .235 | 19 | 95 | 0 | 0 | 0 | 0.00 | 0 |
| Billy Joel | 2028-2028 | .298 | 8 | 49 | 0 | 0 | 0 | 0.00 | 0 |
| Kennan Johannson | 2017-2019 | .000 | 0 | 0 | 5 | 7 | 1 | 5.01 | 143 |
| Allahbukhsh Johiya | 2020-2022 | .259 | 6 | 70 | 0 | 0 | 0 | 0.00 | 0 |
| Fakhruddin Johiya | 2018-2021 | .000 | 0 | 0 | 14 | 16 | 0 | 4.54 | 245 |
| Cutter John | 2012-2014 | .177 | 0 | 6 | 26 | 14 | 0 | 3.17 | 239 |
| Andrew Johnson | 2027-2027 | .000 | 0 | 0 | 1 | 0 | 1 | 2.19 | 20 |
| Chris Johnson | 2021-2021 | .000 | 0 | 0 | 12 | 5 | 0 | 3.32 | 150 |
| Jared Johnson | 2016-2018 | .297 | 26 | 152 | 0 | 0 | 0 | 0.00 | 0 |
| Patrick Johnson | 2021-2026 | .000 | 0 | 0 | 13 | 17 | 3 | 5.62 | 205 |
| Ron Johnson | 2019-2025 | .241 | 10 | 118 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Johnson | 2016-2016 | .282 | 14 | 80 | 0 | 0 | 0 | 0.00 | 0 |
| Todd Johnson | 2024-2026 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 7 |
| Walter Johnson | 2028-2028 | .293 | 2 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Bob Johnston | 2025-2026 | .000 | 0 | 0 | 6 | 10 | 0 | 2.98 | 140 |
| Chris Johnston | 2027-2027 | .304 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Jason Johnston | 2013-2014 | .000 | 0 | 0 | 9 | 8 | 25 | 3.69 | 124 |
| Joshua Johnston | 2017-2017 | .167 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Mitch Johnston | 2017-2022 | .000 | 0 | 0 | 29 | 28 | 0 | 4.14 | 553 |
| Paul Johnston | 2024-2025 | .000 | 0 | 0 | 9 | 3 | 0 | 4.07 | 166 |
| Roy Johnston | 2027-2028 | .257 | 10 | 58 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Johnston | 2016-2018 | .270 | 45 | 167 | 0 | 0 | 0 | 0.00 | 0 |
| Steve Johnston | 2012-2012 | .000 | 0 | 0 | 8 | 10 | 0 | 3.81 | 139 |
| Tom Johnston | 2015-2016 | .245 | 4 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Wes Johnston | 2015-2020 | .000 | 0 | 0 | 7 | 5 | 3 | 5.31 | 140 |
| Jordan Johnstone | 2014-2014 | .000 | 0 | 0 | 5 | 6 | 0 | 3.86 | 80 |
| Kai Jolliffe | 2024-2025 | .222 | 2 | 26 | 0 | 0 | 0 | 0.00 | 0 |
| Al Jones | 2018-2019 | .000 | 0 | 0 | 12 | 12 | 1 | 5.23 | 210 |
| Cody Jones | 2028-2028 | .267 | 3 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Harvey Jones | 2018-2018 | .000 | 0 | 0 | 10 | 2 | 2 | 2.67 | 98 |
| John Jones | 2024-2024 | 1.000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| John Jones | 2026-2026 | .000 | 0 | 0 | 0 | 1 | 0 | 4.91 | 5 |
| Leonard Jones | 2018-2019 | .000 | 0 | 0 | 3 | 0 | 0 | 1.80 | 27 |
| Mike Jones | 2015-2015 | .000 | 0 | 0 | 4 | 3 | 2 | 2.63 | 75 |
| Oscar Jones | 2019-2020 | .265 | 13 | 79 | 0 | 0 | 0 | 0.00 | 0 |
| Peter Jones | 2015-2015 | .285 | 8 | 62 | 0 | 0 | 0 | 0.00 | 0 |
| Ron Jones | 2017-2019 | .000 | 0 | 0 | 6 | 14 | 9 | 3.68 | 252 |
| Tonny Jongenelen | 2020-2026 | .258 | 5 | 43 | 0 | 0 | 0 | 0.00 | 0 |
| Kuang-an Joo | 2022-2023 | .000 | 0 | 0 | 12 | 8 | 23 | 4.16 | 126 |
| Shan-bo Joo | 2021-2023 | .000 | 0 | 0 | 0 | 0 | 1 | 8.55 | 65 |
| Zhi-peng Joo | 2021-2022 | .292 | 13 | 58 | 0 | 0 | 0 | 0.00 | 0 |
| Karl Jordan | 2018-2021 | .226 | 5 | 71 | 0 | 0 | 0 | 0.00 | 0 |
| Roy Jordan | 2020-2023 | .198 | 1 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Ben Jose | 2028-2028 | .000 | 0 | 0 | 1 | 1 | 0 | 18.00 | 4 |
| Chris Joseph | 2016-2016 | .252 | 16 | 53 | 0 | 0 | 0 | 0.00 | 0 |
| Nathaniel Joseph | 2028-2028 | .290 | 0 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Nicolas Joubert | 2028-2028 | .000 | 0 | 0 | 2 | 1 | 4 | 1.33 | 56 |
| Masaru Jouda | 2028-2028 | .000 | 0 | 0 | 2 | 3 | 0 | 4.53 | 64 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Satoshi Jouda | 2027-2027 | .246 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Dimitri Jourdan | 2026-2028 | .000 | 0 | 0 | 13 | 7 | 15 | 3.55 | 291 |
| Earl Joyner | 2020-2026 | .298 | 14 | 182 | 0 | 0 | 0 | 0.00 | 0 |
| Wei-qiang Ju | 2028-2028 | .245 | 4 | 39 | 0 | 0 | 0 | 0.00 | 0 |
| Khai Juan | 2026-2027 | .000 | 0 | 0 | 3 | 9 | 1 | 9.23 | 104 |
| Qing-lai Juan | 2028-2028 | .000 | 0 | 0 | 5 | 4 | 0 | 4.70 | 54 |
| Xun Juan | 2020-2023 | .274 | 29 | 190 | 0 | 0 | 0 | 0.00 | 0 |
| Fernando Juárez | 2028-2028 | .277 | 2 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Jeff Juárez | 2022-2022 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ye-qing Jue | 2019-2026 | .000 | 0 | 0 | 10 | 3 | 3 | 3.25 | 243 |
| Alastair Juhl | 2026-2027 | .000 | 0 | 0 | 0 | 0 | 0 | 2.16 | 19 |
| Rafael Júlio | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Emir Jumah | 2019-2020 | .222 | 6 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Guang Jung | 2020-2020 | .103 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Ling-lai Jung | 2024-2028 | .000 | 0 | 0 | 8 | 22 | 0 | 5.31 | 225 |
| Luo-shan Jung | 2028-2028 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Mason Jupe | 2018-2027 | .270 | 23 | 148 | 0 | 0 | 0 | 0.00 | 0 |
| Loeck Jurgens | 2021-2022 | .000 | 0 | 0 | 7 | 14 | 0 | 4.44 | 184 |
