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Adrian Zabala
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1948 | CLE | 5.22 | 0 | 2 | 1 | 37 | 0 | 0 | 0 | 39.2 | 56 | 24 | 23 | 16 | 6 | 4 | 1.84 |
| Career | 5.22 | 0 | 2 | 1 | 37 | 0 | 0 | 0 | 39.2 | 56 | 24 | 23 | 16 | 6 | 4 | 1.82 | |

Chris Zachary
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1962 | NYY | 4.50 | 0 | 0 | 1 | 7 | 0 | 0 | 0 | 8.0 | 8 | 4 | 4 | 5 | 4 | 0 | 1.63 |
| 1964 | NYY | 15.43 | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 9.1 | 25 | 18 | 16 | 6 | 5 | 2 | 3.41 |
| 1966 | NYY | 3.44 | 4 | 1 | 0 | 28 | 2 | 0 | 0 | 68.0 | 54 | 28 | 26 | 41 | 42 | 8 | 1.40 |
| 1968 | NYY | 8.49 | 0 | 0 | 0 | 15 | 0 | 0 | 0 | 23.1 | 36 | 24 | 22 | 7 | 13 | 4 | 1.86 |
| 1970 | NYY | 6.98 | 0 | 1 | 1 | 36 | 0 | 0 | 0 | 59.1 | 99 | 48 | 46 | 21 | 38 | 5 | 2.03 |
| Career | 6.11 | 4 | 2 | 2 | 94 | 2 | 0 | 0 | 168.0 | 222 | 122 | 114 | 80 | 102 | 19 | 1.80 | |

Dom Zanni
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1960 | MIN | 3.94 | 2 | 0 | 0 | 18 | 0 | 0 | 0 | 16.0 | 19 | 8 | 7 | 17 | 13 | 0 | 2.25 |
| 1962 | MIN | 7.04 | 6 | 3 | 0 | 61 | 0 | 0 | 0 | 55.0 | 68 | 50 | 43 | 33 | 49 | 9 | 1.84 |
| Career | 6.34 | 8 | 3 | 0 | 79 | 0 | 0 | 0 | 71.0 | 87 | 58 | 50 | 50 | 62 | 9 | 1.93 | |

Bill Zepp
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1970 | PIT | 2.70 | 2 | 1 | 0 | 35 | 0 | 0 | 0 | 53.1 | 53 | 19 | 16 | 29 | 23 | 1 | 1.54 |
| Career | 2.70 | 2 | 1 | 0 | 35 | 0 | 0 | 0 | 53.1 | 53 | 19 | 16 | 29 | 23 | 1 | 1.54 | |

Sam Zoldak
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1946 | PIT | 2.95 | 15 | 4 | 0 | 24 | 24 | 1 | 1 | 152.2 | 141 | 59 | 50 | 62 | 34 | 15 | 1.33 |
| 1948 | PIT | 4.54 | 8 | 8 | 0 | 28 | 28 | 4 | 0 | 168.1 | 200 | 96 | 85 | 45 | 28 | 18 | 1.46 |
| 1950 | PIT | 3.51 | 5 | 8 | 0 | 21 | 21 | 2 | 0 | 138.1 | 143 | 69 | 54 | 36 | 14 | 13 | 1.30 |
| 1952 | PIT | 4.68 | 10 | 5 | 4 | 66 | 0 | 0 | 0 | 73.0 | 96 | 44 | 38 | 24 | 7 | 7 | 1.64 |
| Career | 3.84 | 38 | 25 | 4 | 139 | 73 | 7 | 1 | 532.1 | 580 | 268 | 227 | 167 | 83 | 53 | 1.40 | |

Bill Zuber
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1946 | WAS | 0.00 | 1 | 0 | 0 | 7 | 0 | 0 | 0 | 10.0 | 5 | 4 | 0 | 8 | 7 | 0 | 1.30 |
| Career | 0.00 | 1 | 0 | 0 | 7 | 0 | 0 | 0 | 10.0 | 5 | 4 | 0 | 8 | 7 | 0 | 1.30 | |

George Zuverink
| Year | Team | ERA | W | L | SV | G | GS | CG | SHO | INN | H | R | ER | BB | SO | HR | Whip |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950 | PIT | 0.00 | 2 | 0 | 0 | 5 | 0 | 0 | 0 | 9.1 | 4 | 1 | 0 | 4 | 4 | 0 | 0.88 |
| 1954 | PIT | 3.99 | 10 | 12 | 0 | 31 | 31 | 4 | 1 | 191.2 | 187 | 91 | 85 | 48 | 67 | 14 | 1.23 |
| 1956 | PIT | 3.59 | 7 | 1 | 1 | 57 | 0 | 0 | 0 | 77.2 | 78 | 38 | 31 | 24 | 13 | 5 | 1.32 |
| 1958 | PIT | 4.07 | 4 | 1 | 2 | 58 | 0 | 0 | 0 | 77.1 | 94 | 45 | 35 | 14 | 21 | 5 | 1.40 |
| Career | 3.82 | 23 | 14 | 3 | 151 | 31 | 4 | 1 | 356.0 | 363 | 175 | 151 | 90 | 105 | 24 | 1.27 | |