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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hikaru Yamaguchi | 2030-2030 | 12 | 5 | .706 | 3.47 | 24 | 24 | 0 | 0 | 0 | 148.0 | 131 | 57 | 11 | 54 | 117 |
| Tadamichi Yamamoto | 2034-2034 | 0 | 0 | .000 | 3.86 | 1 | 0 | 0 | 0 | 0 | 2.1 | 2 | 1 | 0 | 0 | 0 |
| Akinori Yamauchi | 2032-2033 | 5 | 6 | .455 | 4.89 | 41 | 0 | 0 | 0 | 6 | 46.0 | 55 | 25 | 5 | 16 | 33 |
| Ron Yarbrough | 2018-2022 | 8 | 6 | .571 | 3.93 | 63 | 8 | 0 | 0 | 13 | 119.0 | 112 | 52 | 14 | 59 | 101 |
| Britt Yates | 2016-2016 | 2 | 1 | .667 | 2.84 | 3 | 3 | 0 | 0 | 0 | 19.0 | 16 | 6 | 0 | 8 | 23 |
| Henry Yates | 2019-2019 | 9 | 9 | .500 | 5.95 | 24 | 24 | 0 | 0 | 0 | 124.0 | 153 | 82 | 14 | 77 | 133 |
| António Ybarra | 2016-2016 | 2 | 0 | 1.000 | 7.30 | 14 | 0 | 0 | 0 | 0 | 24.2 | 35 | 20 | 2 | 14 | 19 |
| Jorge Ybarra | 2015-2016 | 3 | 1 | .750 | 4.74 | 16 | 0 | 0 | 0 | 0 | 19.0 | 13 | 10 | 0 | 10 | 16 |
| Won-u Yi | 2028-2029 | 6 | 4 | .600 | 2.78 | 13 | 13 | 0 | 0 | 0 | 77.2 | 56 | 24 | 5 | 32 | 73 |
| Hakan Yilmanz | 2029-2031 | 6 | 12 | .333 | 4.09 | 95 | 0 | 0 | 0 | 23 | 99.0 | 98 | 45 | 13 | 42 | 95 |
| Ryan York | 2026-2028 | 0 | 1 | .000 | 4.29 | 22 | 2 | 0 | 0 | 0 | 42.0 | 41 | 20 | 4 | 31 | 30 |
| Yoriyoshi Yoshimura | 2028-2030 | 22 | 18 | .550 | 3.29 | 65 | 59 | 3 | 0 | 0 | 374.1 | 330 | 137 | 34 | 172 | 328 |
| Bae Yun | 2033-2033 | 0 | 2 | .000 | 21.00 | 5 | 5 | 0 | 0 | 0 | 3.0 | 5 | 7 | 0 | 7 | 4 |
| Dong-soo Yun | 2031-2032 | 3 | 7 | .300 | 5.16 | 14 | 11 | 0 | 0 | 0 | 68.0 | 71 | 39 | 4 | 43 | 29 |
