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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Toshiya Yajirobei | 2012-2022 | 17 | 42 | .288 | 5.56 | 278 | 50 | 0 | 0 | 3 | 474.1 | 559 | 293 | 39 | 278 | 204 |
| Takuro Yamada | 2016-2025 | 14 | 21 | .400 | 5.94 | 183 | 32 | 0 | 0 | 1 | 321.0 | 329 | 212 | 54 | 212 | 162 |
| Kiyonobu Yamamoto | 2023-2029 | 29 | 20 | .592 | 4.42 | 93 | 69 | 0 | 0 | 1 | 417.1 | 437 | 205 | 60 | 158 | 334 |
| Nobuo Yamamoto | 2030-2034 | 41 | 20 | .672 | 4.16 | 101 | 84 | 1 | 0 | 0 | 554.1 | 591 | 256 | 67 | 166 | 470 |
| Yoshihiro Yamamoto | 2022-2022 | 2 | 5 | .286 | 10.04 | 57 | 0 | 0 | 0 | 1 | 80.2 | 103 | 90 | 15 | 69 | 35 |
| Iemitsu Yamane | 2025-2026 | 2 | 0 | 1.000 | 8.13 | 39 | 0 | 0 | 0 | 0 | 52.0 | 76 | 47 | 12 | 25 | 22 |
| Kiyonori Yamasaki | 2027-2029 | 10 | 9 | .526 | 5.69 | 41 | 30 | 0 | 0 | 0 | 178.2 | 169 | 113 | 24 | 137 | 188 |
| Kumanosuke Yamasaki | 2029-2033 | 0 | 0 | .000 | 81.00 | 1 | 0 | 0 | 0 | 0 | 0.2 | 1 | 6 | 0 | 5 | 1 |
| Yuji Yamasaki | 2014-2014 | 0 | 0 | .000 | 8.27 | 12 | 0 | 0 | 0 | 1 | 16.1 | 17 | 15 | 3 | 13 | 13 |
| Manny Yan | 2028-2032 | 5 | 5 | .500 | 7.08 | 118 | 0 | 0 | 0 | 2 | 122.0 | 152 | 96 | 18 | 83 | 89 |
| Tetsya Yanaguchi | 2009-2022 | 66 | 106 | .384 | 4.41 | 504 | 298 | 1 | 0 | 7 | 1667.0 | 1775 | 816 | 234 | 305 | 1141 |
| You-liang Yang | 2015-2018 | 4 | 3 | .571 | 5.18 | 33 | 5 | 0 | 0 | 3 | 64.1 | 58 | 37 | 3 | 42 | 23 |
| Ichiro Yasuda | 2032-2034 | 30 | 25 | .545 | 4.17 | 75 | 75 | 1 | 0 | 0 | 433.1 | 481 | 201 | 52 | 107 | 309 |
| Tyler Yates | 2005-2005 | 1 | 1 | .500 | 7.59 | 10 | 0 | 0 | 0 | 0 | 10.2 | 11 | 9 | 0 | 10 | 8 |
| Joshua York | 2017-2025 | 14 | 6 | .700 | 4.74 | 281 | 0 | 0 | 0 | 5 | 298.1 | 324 | 157 | 38 | 155 | 152 |
| Katsunan Yoshida | 2020-2027 | 31 | 54 | .365 | 6.11 | 261 | 107 | 1 | 0 | 2 | 694.0 | 782 | 471 | 67 | 503 | 452 |
| Nobukai Yoshida | 2007-2007 | 0 | 0 | .000 | 2.08 | 9 | 0 | 0 | 0 | 0 | 13.0 | 16 | 3 | 1 | 7 | 5 |
| Jason Young | 2005-2011 | 40 | 48 | .455 | 4.94 | 308 | 88 | 0 | 0 | 5 | 729.1 | 704 | 400 | 114 | 325 | 649 |
| Ryan Young | 2034-2034 | 1 | 1 | .500 | 1.69 | 16 | 0 | 0 | 0 | 1 | 21.1 | 10 | 4 | 0 | 15 | 22 |
| Jason Youngberg | 2012-2025 | 63 | 37 | .630 | 4.10 | 679 | 0 | 0 | 0 | 119 | 810.1 | 834 | 369 | 84 | 263 | 536 |
| Shou-chien Yuan | 2029-2031 | 6 | 6 | .500 | 4.62 | 111 | 0 | 0 | 0 | 0 | 132.1 | 156 | 68 | 10 | 65 | 61 |
