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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Toyokazu Yamada | 1942-1943 | 3 | 3 | .500 | 4.07 | 7 | 7 | 3 | 2 | 0 | 48.2 | 42 | 22 | 2 | 17 | 37 |
| Shuzo Yamaguchi | 1987-1990 | 6 | 8 | .429 | 8.53 | 47 | 16 | 0 | 0 | 1 | 133.0 | 182 | 126 | 12 | 108 | 56 |
| Hiroshi Yamamoto | 1927-1928 | 10 | 13 | .435 | 4.75 | 29 | 25 | 2 | 0 | 0 | 178.0 | 196 | 94 | 15 | 80 | 117 |
| Kiyomitsu Yamamoto | 1917-1919 | 6 | 3 | .667 | 3.20 | 40 | 0 | 0 | 0 | 6 | 81.2 | 59 | 29 | 4 | 43 | 72 |
| Kosho Yamasaki | 1986-1986 | 3 | 0 | 1.000 | 2.51 | 8 | 8 | 0 | 0 | 0 | 46.2 | 43 | 13 | 3 | 15 | 16 |
| Teinosuke Yamashita | 1919-1922 | 29 | 34 | .460 | 4.29 | 124 | 49 | 13 | 0 | 11 | 504.0 | 572 | 240 | 29 | 221 | 142 |
| Noboru Yamauchi | 1955-1956 | 22 | 14 | .611 | 4.81 | 71 | 30 | 3 | 0 | 1 | 364.2 | 366 | 195 | 37 | 208 | 226 |
| Bo-young Yang | 1990-1990 | 6 | 3 | .667 | 4.38 | 10 | 10 | 3 | 0 | 0 | 72.0 | 79 | 35 | 9 | 35 | 40 |
| Damien Yarrow | 1951-1954 | 5 | 4 | .556 | 7.97 | 66 | 2 | 0 | 0 | 2 | 168.1 | 227 | 149 | 20 | 97 | 72 |
| Julius Yates | 1925-1926 | 5 | 4 | .556 | 3.63 | 42 | 0 | 0 | 0 | 5 | 91.2 | 98 | 37 | 7 | 38 | 40 |
| Fernando Ybarra | 1973-1974 | 3 | 2 | .600 | 6.46 | 10 | 3 | 1 | 0 | 1 | 39.0 | 44 | 28 | 6 | 26 | 20 |
| Quentin Yeo | 1920-1921 | 19 | 19 | .500 | 5.23 | 48 | 42 | 5 | 0 | 3 | 299.2 | 365 | 174 | 24 | 128 | 117 |
| Dae-ik Yi | 1970-1970 | 1 | 0 | 1.000 | 5.00 | 1 | 1 | 1 | 0 | 0 | 9.0 | 9 | 5 | 1 | 4 | 3 |
| Dong-kyoon Yi | 1978-1978 | 7 | 17 | .292 | 6.29 | 28 | 28 | 14 | 1 | 0 | 220.1 | 271 | 154 | 28 | 139 | 117 |
| Yong-koo Yi | 1991-1991 | 1 | 1 | .500 | 7.94 | 2 | 2 | 0 | 0 | 0 | 11.1 | 13 | 10 | 4 | 11 | 6 |
| Robin Yoder | 1990-1990 | 0 | 0 | .000 | 36.00 | 2 | 0 | 0 | 0 | 0 | 2.0 | 6 | 8 | 1 | 5 | 2 |
| Kazuyoshi Yokoyama | 1990-1991 | 0 | 0 | .000 | 13.50 | 2 | 0 | 0 | 0 | 0 | 0.2 | 2 | 1 | 0 | 0 | 1 |
| Jeff York | 1942-1943 | 22 | 18 | .550 | 4.18 | 78 | 51 | 4 | 1 | 4 | 385.2 | 397 | 179 | 31 | 186 | 288 |
| Hiroya Yoshida | 1937-1938 | 20 | 31 | .392 | 4.71 | 61 | 61 | 12 | 0 | 0 | 438.0 | 493 | 229 | 36 | 150 | 289 |
| Yodo Yoshida | 1970-1974 | 12 | 9 | .571 | 3.78 | 27 | 27 | 11 | 2 | 0 | 200.0 | 172 | 84 | 21 | 86 | 112 |
| Kuniyuki Yoshimura | 1989-1989 | 8 | 4 | .667 | 4.62 | 24 | 14 | 0 | 0 | 1 | 87.2 | 93 | 45 | 1 | 70 | 39 |
| Jun Yoshioka | 1988-1991 | 0 | 1 | .000 | 24.30 | 2 | 1 | 0 | 0 | 0 | 3.1 | 8 | 9 | 2 | 4 | 1 |
| Justin Young | 1967-1969 | 11 | 7 | .611 | 5.46 | 53 | 12 | 1 | 0 | 6 | 163.1 | 168 | 99 | 18 | 102 | 75 |
| Jerome Younger | 1986-1989 | 5 | 19 | .208 | 6.59 | 37 | 27 | 4 | 0 | 1 | 181.2 | 234 | 133 | 25 | 105 | 91 |
| John Younger | 1948-1951 | 0 | 0 | .000 | 11.57 | 1 | 0 | 0 | 0 | 0 | 2.1 | 1 | 3 | 0 | 5 | 2 |
