Whitey Ford had the best ERA by a rookie left-hander with 50.0+ innings pitched in 1950, with an ERA of 2.81.
| NAME | ERA | IP | SEASON | TM | G | W | L | W% | GS | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | W. Ford | 2.81 | 112.0 | 1950 |  NYY | 20 | 9 | 1 | .900 | 12 | 59 | 7 | 2 | 1 | 87 | 35 | 39 | 7 | 52 | 2 | 5 | 465 | 3 | 4.74 | 4.18 | 1.13 | 0.56 | 12.7 | 11.2 | 1.24 | .232 | 3.13 | 64 | 3.79 | 89 | 6.99 | 5.9 | |
| 2 |  | B. Cain | 3.93 | 171.2 | 1950 |  CWS | 34 | 9 | 12 | .429 | 23 | 77 | 11 | 1 | 2 | 153 | 75 | 80 | 12 | 109 | 5 | 9 | 752 | 3 | 4.04 | 5.71 | 0.71 | 0.63 | 10.2 | 14.5 | 1.53 | .257 | 4.19 | 89 | 4.59 | 106 | 8.02 | -5.7 | |
| 3 |  | A. Sima | 4.79 | 77.0 | 1950 |  WSH | 17 | 4 | 5 | .444 | 9 | 23 | 1 | 0 | 0 | 89 | 41 | 49 | 9 | 26 | 1 | 2 | 342 | 1 | 2.69 | 3.04 | 0.88 | 1.05 | 6.7 | 7.6 | 1.49 | .283 | 5.73 | 106 | 4.56 | 104 | 10.40 | -1.4 | |
| 4 | | S. Nagy | 6.58 | 53.1 | 1950 | WSH | 9 | 2 | 5 | .286 | 9 | 17 | 2 | 0 | 0 | 69 | 39 | 50 | 5 | 29 | 0 | 0 | 258 | 0 | 2.87 | 4.89 | 0.59 | 0.84 | 6.6 | 11.2 | 1.84 | .309 | 8.44 | 145 | 4.80 | 109 | 11.64 | -2.4 |
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