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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eisaku Yamada | 2014-2017 | 7 | 1 | .875 | 2.65 | 46 | 0 | 0 | 0 | 0 | 54.1 | 41 | 16 | 2 | 28 | 43 |
| Hirokumi Yamaguchi | 2019-2020 | 9 | 3 | .750 | 4.78 | 108 | 0 | 0 | 0 | 2 | 107.1 | 117 | 57 | 11 | 57 | 64 |
| Yunosuke Yamamoto | 2012-2014 | 15 | 11 | .577 | 3.55 | 169 | 0 | 0 | 0 | 13 | 301.1 | 299 | 119 | 30 | 86 | 243 |
| Jacob Yancy | 2036-2041 | 5 | 2 | .714 | 4.10 | 29 | 0 | 0 | 0 | 2 | 37.1 | 39 | 17 | 5 | 18 | 23 |
| Shi-fa Yang | 2028-2036 | 53 | 51 | .510 | 5.38 | 244 | 131 | 0 | 0 | 5 | 871.1 | 933 | 521 | 156 | 344 | 802 |
| Gino Yarnell | 2010-2017 | 35 | 28 | .556 | 4.82 | 242 | 54 | 2 | 0 | 12 | 582.0 | 553 | 312 | 87 | 301 | 555 |
| Meiya Yasuhiro | 2010-2012 | 11 | 11 | .500 | 5.47 | 100 | 19 | 0 | 0 | 0 | 261.2 | 332 | 159 | 28 | 98 | 120 |
| Dudley Yates | 2036-2045 | 26 | 15 | .634 | 4.84 | 168 | 53 | 6 | 1 | 0 | 522.0 | 542 | 281 | 88 | 176 | 487 |
| Frank Yates | 2033-2041 | 0 | 0 | .000 | 8.10 | 1 | 0 | 0 | 0 | 0 | 3.1 | 6 | 3 | 1 | 1 | 2 |
| John Yates | 2049-2051 | 1 | 2 | .333 | 9.00 | 29 | 5 | 0 | 0 | 0 | 38.0 | 55 | 38 | 11 | 30 | 19 |
| Joo-il Yi | 2016-2030 | 50 | 69 | .420 | 4.05 | 852 | 0 | 0 | 0 | 285 | 894.2 | 847 | 403 | 74 | 406 | 787 |
| Sung-hwan Yi | 2049-2051 | 18 | 14 | .562 | 5.28 | 41 | 40 | 4 | 3 | 0 | 250.2 | 260 | 147 | 54 | 63 | 218 |
| Tan Yo | 2048-2051 | 16 | 14 | .533 | 3.80 | 129 | 50 | 0 | 0 | 8 | 211.0 | 188 | 89 | 26 | 48 | 192 |
| Takashi Yokoyama | 2048-2048 | 0 | 1 | .000 | 8.22 | 6 | 4 | 0 | 0 | 0 | 15.1 | 13 | 14 | 2 | 15 | 8 |
| Joo-young Yon | 2017-2023 | 46 | 49 | .484 | 5.25 | 211 | 99 | 2 | 0 | 2 | 729.0 | 793 | 425 | 136 | 286 | 678 |
| Shinobu Yoshida | 2025-2027 | 1 | 0 | 1.000 | 9.45 | 16 | 0 | 0 | 0 | 0 | 6.2 | 5 | 7 | 1 | 8 | 7 |
| Toyokazu Yoshimura | 2019-2019 | 1 | 4 | .200 | 10.62 | 31 | 0 | 0 | 0 | 13 | 29.2 | 44 | 35 | 5 | 25 | 12 |
| B.J. Young | 2037-2051 | 239 | 109 | .687 | 3.17 | 461 | 458 | 71 | 28 | 0 | 3270.0 | 2852 | 1153 | 263 | 928 | 3101 |
| Melvin Young | 2022-2033 | 103 | 134 | .435 | 4.76 | 365 | 322 | 4 | 1 | 1 | 1916.1 | 1880 | 1014 | 334 | 742 | 2347 |
| William Young | 2023-2032 | 13 | 10 | .565 | 5.04 | 312 | 4 | 0 | 0 | 14 | 457.1 | 461 | 256 | 42 | 240 | 486 |
