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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 |
|---|---|---|---|---|---|---|---|---|---|
| José Ibarra | 2016-2020 | .311 | 137 | 423 | 0 | 0 | 0 | 0.00 | 0 |
| Rodrigo Ibarra | 2021-2022 | .327 | 7 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| Kuma Ichihara | 2021-2026 | .270 | 12 | 86 | 0 | 0 | 0 | 0.00 | 0 |
| Tetsuzan Ichihara | 2026-2027 | .000 | 0 | 0 | 0 | 1 | 3 | 2.82 | 22 |
| Yachi Ichihara | 2025-2025 | .329 | 2 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Yoshiiku Ichihara | 2023-2024 | .000 | 0 | 0 | 4 | 13 | 8 | 5.79 | 130 |
| Yoshikazu Ichihara | 2027-2027 | .000 | 0 | 0 | 3 | 2 | 20 | 1.83 | 37 |
| Yoshitoki Ichihara | 2013-2013 | .297 | 1 | 27 | 0 | 0 | 0 | 0.00 | 0 |
| Katsuhiko Ichikawa | 2015-2019 | .000 | 0 | 0 | 17 | 12 | 3 | 4.70 | 328 |
| Morihiro Ichikawa | 2027-2027 | .223 | 3 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Tsuneyo Ichikawa | 2025-2026 | .000 | 0 | 0 | 1 | 0 | 0 | 3.29 | 96 |
| Yasunari Ichikawa | 2027-2027 | .400 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Osamu Iesada | 2026-2027 | .207 | 4 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Shigochiyo Iida | 2017-2020 | .255 | 7 | 70 | 0 | 0 | 0 | 0.00 | 0 |
| Shunso Iijima | 2025-2025 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Yaichiro Iijima | 2025-2025 | .194 | 3 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Atsushi Iitsuka | 2022-2022 | .000 | 0 | 0 | 6 | 6 | 0 | 6.03 | 99 |
| Yasujiro Iitsuka | 2026-2027 | .275 | 6 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Akihisa Ikeda | 2026-2027 | .221 | 2 | 35 | 0 | 0 | 0 | 0.00 | 0 |
| Eiichi Ikeda | 2026-2027 | .000 | 0 | 0 | 14 | 10 | 20 | 3.07 | 225 |
| Hidemichi Ikeda | 2025-2027 | .000 | 0 | 0 | 0 | 1 | 4 | 6.20 | 64 |
| Isei Ikeda | 2026-2027 | .299 | 0 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Kensaku Ikeda | 2020-2027 | .000 | 0 | 0 | 7 | 6 | 1 | 4.57 | 164 |
| Kunisada Ikeda | 2021-2022 | .265 | 0 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Motonobu Ikeda | 2015-2017 | .218 | 19 | 103 | 0 | 0 | 0 | 0.00 | 0 |
| Natsuo Ikeda | 2023-2025 | .269 | 6 | 80 | 0 | 0 | 0 | 0.00 | 0 |
| Nobuatsu Ikeda | 2021-2022 | .265 | 0 | 4 | 0 | 0 | 0 | 0.00 | 0 |
| Noriyuki Ikeda | 2021-2024 | .000 | 0 | 0 | 7 | 2 | 0 | 3.26 | 156 |
| Shoichi Ikeda | 2025-2025 | .000 | 0 | 0 | 6 | 10 | 0 | 4.31 | 133 |
| Ukessun Ilaes | 2026-2026 | .000 | 0 | 0 | 7 | 3 | 0 | 2.60 | 136 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Edward Ilett | 2024-2026 | .255 | 13 | 86 | 0 | 0 | 0 | 0.00 | 0 |
| Armando Ilharco | 2012-2020 | .258 | 11 | 65 | 0 | 0 | 0 | 0.00 | 0 |
| Dong-hee Im | 2024-2024 | .000 | 0 | 0 | 1 | 0 | 1 | 3.51 | 22 |
| Kuniaki Imai | 2014-2027 | .000 | 0 | 0 | 4 | 0 | 0 | 2.69 | 78 |
| Takahashi Imai | 2023-2024 | .000 | 0 | 0 | 8 | 7 | 0 | 4.06 | 204 |
| Motonobu Imamura | 2025-2027 | .224 | 15 | 85 | 0 | 0 | 0 | 0.00 | 0 |
| Yorikane Imamura | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 7.00 | 18 |
| François Imbert | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Laroya Imperial | 2019-2021 | .261 | 14 | 85 | 0 | 0 | 0 | 0.00 | 0 |
| Masato Inagawa | 2027-2027 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Hideyoshi Ine | 2017-2018 | .267 | 20 | 89 | 0 | 0 | 0 | 0.00 | 0 |
| Junnosuke Ine | 2021-2023 | .000 | 0 | 0 | 8 | 30 | 0 | 8.31 | 216 |
| Kojuro Ine | 2023-2024 | .298 | 4 | 28 | 0 | 0 | 0 | 0.00 | 0 |
| Masaharu Ine | 2025-2025 | .184 | 0 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Mitsuo Ine | 2023-2023 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Mitsuo Ine | 2018-2021 | .000 | 0 | 0 | 20 | 27 | 2 | 6.26 | 427 |
| Ryuichi Ine | 2026-2027 | .204 | 1 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Ryunosuke Ine | 2024-2027 | .000 | 0 | 0 | 18 | 16 | 0 | 3.32 | 325 |
| Sekien Ine | 2026-2026 | .000 | 0 | 0 | 0 | 0 | 0 | 11.25 | 6 |
| Shimei Ine | 2020-2022 | .000 | 0 | 0 | 1 | 3 | 0 | 5.84 | 93 |
| Suezo Ine | 2027-2027 | .305 | 1 | 11 | 0 | 0 | 0 | 0.00 | 0 |
| Toshiyuki Ine | 2026-2027 | .231 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Yoriie Ine | 2014-2019 | .197 | 24 | 165 | 0 | 0 | 0 | 0.00 | 0 |
| Yoritomo Ine | 2017-2017 | .000 | 0 | 0 | 5 | 5 | 0 | 4.39 | 100 |
| Aurelio Infante | 2019-2020 | .209 | 4 | 28 | 0 | 0 | 0 | 0.00 | 0 |
| Ken Ingram | 2022-2022 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Artashes Injeyan | 2019-2025 | .000 | 0 | 0 | 10 | 4 | 19 | 2.80 | 155 |
| Dennis Inman | 2018-2018 | .000 | 0 | 0 | 0 | 0 | 2 | 1.02 | 32 |
| Kamatari Inoue | 2017-2018 | .243 | 5 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Ken'ichi Inoue | 2018-2019 | .341 | 4 | 46 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Koji Inoue | 2026-2027 | .220 | 7 | 29 | 0 | 0 | 0 | 0.00 | 0 |
| Kyoichi Inoue | 2014-2018 | .301 | 23 | 188 | 0 | 0 | 0 | 0.00 | 0 |
| Minoru Inoue | 2026-2026 | .213 | 1 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Shinobu Inoue | 2026-2026 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Shojiro Inoue | 2024-2026 | .000 | 0 | 0 | 10 | 12 | 90 | 3.42 | 211 |
| Sumitomo Inoue | 2025-2027 | .194 | 3 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Tadasu Inoue | 2025-2027 | .264 | 18 | 127 | 0 | 0 | 0 | 0.00 | 0 |
| Takahiro Inoue | 2023-2024 | .000 | 0 | 0 | 4 | 34 | 0 | 8.65 | 164 |
| Ton Inoue | 2022-2024 | .265 | 19 | 99 | 0 | 0 | 0 | 0.00 | 0 |
| Tsuginori Inoue | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Yoshihiro Inoue | 2013-2013 | .281 | 13 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Yutaka Inoue | 2022-2023 | .196 | 0 | 7 | 0 | 0 | 0 | 0.00 | 0 |
| Justin Irvin | 2021-2023 | .000 | 0 | 0 | 7 | 10 | 2 | 4.84 | 180 |
| Mostafa Isfahani | 0-0 | .000 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Kojiro Ishibashi | 2023-2027 | .283 | 7 | 46 | 0 | 0 | 0 | 0.00 | 0 |
| Kotaro Ishida | 2021-2021 | .000 | 0 | 0 | 1 | 0 | 1 | 6.62 | 26 |
| Makoto Ishida | 2023-2025 | .000 | 0 | 0 | 7 | 5 | 4 | 4.11 | 162 |
| Yeijiro Ishihara | 2020-2021 | .000 | 0 | 0 | 7 | 9 | 0 | 4.23 | 171 |
| Masatake Ishii | 2017-2026 | .306 | 28 | 161 | 0 | 0 | 0 | 0.00 | 0 |
| Osamu Ishii | 2023-2027 | .000 | 0 | 0 | 3 | 23 | 0 | 5.85 | 149 |
| Mito Ishikawa | 2026-2027 | .000 | 0 | 0 | 16 | 18 | 0 | 4.31 | 247 |
| Nobuhiko Ishikawa | 2022-2022 | .385 | 1 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Takayuki Ishikawa | 2024-2026 | .308 | 7 | 38 | 0 | 0 | 0 | 0.00 | 0 |
| Tomokazu Ishikawa | 2025-2027 | .209 | 1 | 40 | 0 | 0 | 0 | 0.00 | 0 |
| Yoshiyuki Ishikawa | 2025-2026 | .000 | 0 | 0 | 2 | 10 | 0 | 6.96 | 98 |
| Seb Ising | 2014-2017 | .000 | 0 | 0 | 5 | 2 | 4 | 4.37 | 66 |
| Ammar Isma'il | 2018-2020 | .000 | 0 | 0 | 24 | 14 | 0 | 4.92 | 334 |
| Mendel Israel | 2019-2019 | .248 | 9 | 53 | 0 | 0 | 0 | 0.00 | 0 |
| Hughie Isted | 2025-2027 | .359 | 3 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Akira Ito | 2015-2018 | .281 | 16 | 80 | 0 | 0 | 0 | 0.00 | 0 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Josuke Ito | 2024-2024 | .000 | 0 | 0 | 3 | 2 | 0 | 4.75 | 25 |
| Kenji Ito | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 0 | 6.00 | 6 |
| Kuniyuki Ito | 2027-2027 | .000 | 0 | 0 | 0 | 0 | 1 | 1.23 | 8 |
| Masahiko Ito | 2023-2027 | .313 | 3 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Nobuhisa Ito | 2023-2025 | .239 | 9 | 103 | 0 | 0 | 0 | 0.00 | 0 |
| Osamu Ito | 2015-2015 | .204 | 7 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Shunen Ito | 2023-2026 | .207 | 8 | 61 | 0 | 0 | 0 | 0.00 | 0 |
| Takahiro Ito | 2022-2022 | .000 | 0 | 0 | 1 | 0 | 0 | 6.23 | 20 |
| Tetsunori Ito | 2026-2027 | .226 | 7 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Tsunayoshi Ito | 2024-2027 | .232 | 32 | 197 | 0 | 0 | 0 | 0.00 | 0 |
| Yoshifumi Ito | 2017-2017 | .000 | 0 | 0 | 5 | 2 | 3 | 2.12 | 59 |
| Yvan Iuliano | 2020-2020 | .000 | 0 | 0 | 0 | 0 | 0 | 5.50 | 15 |
| Ken Ives | 2013-2017 | .000 | 0 | 0 | 7 | 9 | 13 | 3.98 | 213 |
| Dennis Ivey | 2027-2027 | .294 | 25 | 74 | 0 | 0 | 0 | 0.00 | 0 |
| Ethan Ivory | 2027-2027 | .000 | 0 | 0 | 5 | 3 | 4 | 4.40 | 86 |
| Kyle Ivory | 2026-2027 | .233 | 1 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Kinnojo Iwamoto | 2020-2022 | .273 | 7 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Norihisa Iwamoto | 2025-2027 | .286 | 19 | 122 | 0 | 0 | 0 | 0.00 | 0 |
| Norishige Iwamoto | 2025-2027 | .238 | 4 | 79 | 0 | 0 | 0 | 0.00 | 0 |
| Otojiro Iwamoto | 2025-2027 | .159 | 3 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Seiichi Iwamoto | 2017-2019 | .244 | 4 | 93 | 0 | 0 | 0 | 0.00 | 0 |
| Okakura Iwasaki | 2017-2018 | .000 | 0 | 0 | 19 | 8 | 0 | 4.15 | 192 |
| Toin Iwata | 2016-2019 | .250 | 4 | 31 | 0 | 0 | 0 | 0.00 | 0 |
