Walt Masterson had a 41-66 record with an ERA of 4.00, 470 strikeouts and 11 saves in 201 appearances for the Washington Senators between the 1940 and 1949 seasons.
| NAME | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | 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. Masterson | 1940 | 31 | 3 | 13 | .188 | 19 | 4.90 | 68 | 3 | 0 | 2 | 130.1 | 128 | 71 | 92 | 6 | 88 | 3 | 9 | 601 | 5 | 4.70 | 6.08 | 0.77 | 0.41 | 11.3 | 14.6 | 1.66 | .280 | 6.35 | 117 | 4.49 | 109 | 8.84 | -5.9 | ||
| 2 | | W. Masterson | 1941 | 34 | 4 | 3 | .571 | 6 | 5.97 | 40 | 1 | 0 | 3 | 78.1 | 101 | 52 | 56 | 3 | 53 | 1 | 13 | 376 | 4 | 4.60 | 6.09 | 0.75 | 0.34 | 10.6 | 14.1 | 1.97 | .351 | 6.43 | 149 | 4.21 | 107 | 11.60 | -2.7 | ||
| 3 | | W. Masterson | 1942 | 25 | 5 | 9 | .357 | 15 | 3.34 | 63 | 8 | 4 | 2 | 142.2 | 138 | 53 | 75 | 6 | 54 | 2 | 7 | 618 | 3 | 3.97 | 3.41 | 1.17 | 0.38 | 10.2 | 8.7 | 1.35 | .268 | 4.73 | 93 | 3.26 | 94 | 8.71 | 3 | ||
| 4 | | W. Masterson | 1945 | 4 | 1 | 2 | .333 | 2 | 1.08 | 14 | 1 | 1 | 0 | 25.0 | 21 | 3 | 8 | 1 | 10 | 0 | 1 | 104 | 0 | 5.04 | 3.60 | 1.40 | 0.36 | 13.5 | 9.6 | 1.24 | .253 | 2.88 | 33 | 3.14 | 94 | 7.56 | 0.5 | ||
| 5 | | W. Masterson | 1946 | 29 | 5 | 6 | .455 | 9 | 6.01 | 61 | 2 | 0 | 1 | 91.1 | 105 | 61 | 70 | 8 | 67 | 3 | 11 | 435 | 2 | 6.01 | 6.60 | 0.91 | 0.79 | 14.0 | 15.4 | 1.88 | .328 | 6.90 | 179 | 4.49 | 136 | 10.35 | -12.8 | ||
| 6 | | W. Masterson | 1947 | 35 | 12 | 16 | .429 | 31 | 3.13 | 135 | 14 | 4 | 1 | 253.0 | 215 | 88 | 98 | 11 | 97 | 2 | 4 | 1,035 | 3 | 4.80 | 3.45 | 1.39 | 0.39 | 13.0 | 9.4 | 1.23 | .258 | 3.49 | 87 | 3.16 | 86 | 7.65 | 13.9 | ||
| 7 | | W. Masterson | 1948 | 33 | 8 | 15 | .348 | 27 | 3.83 | 72 | 9 | 2 | 2 | 188.0 | 171 | 80 | 88 | 12 | 122 | 4 | 4 | 829 | 3 | 3.45 | 5.84 | 0.59 | 0.57 | 8.7 | 14.7 | 1.56 | .257 | 4.21 | 91 | 4.74 | 115 | 8.19 | -13.5 | ||
| 8 | | W. Masterson | 1949 | 10 | 3 | 2 | .600 | 7 | 3.23 | 17 | 3 | 0 | 0 | 53.0 | 42 | 19 | 22 | 4 | 21 | 3 | 1 | 219 | 1 | 2.89 | 3.57 | 0.81 | 0.68 | 7.8 | 9.6 | 1.19 | .218 | 3.74 | 78 | 4.21 | 101 | 7.13 | -0.2 | ||
| Total | 201 | 41 | 66 | .383 | 116 | 4.00 | 470 | 41 | 11 | 11 | 961.2 | 921 | 427 | 509 | 51 | 512 | 18 | 50 | 4,217 | 21 | 4.40 | 4.79 | 0.92 | 0.48 | 11.1 | 12.1 | 1.49 | .275 | 4.76 | 105 | 3.93 | 104 | 8.62 | -17.7 |
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52 | 35 | .598 | ||
50 | 39 | .562 | 3.0 | |
48 | 42 | .533 | 5.5 | |
46 | 44 | .511 | 7.5 | |
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47 | 39 | .547 | 6.5 | |
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Rockies| AL East | W | L | PCT | GB |
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52 | 34 | .605 | ||
49 | 39 | .557 | 4.0 | |
42 | 47 | .472 | 11.5 | |
42 | 48 | .467 | 12.0 | |
39 | 48 | .448 | 13.5 | |
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46 | 42 | .523 | ||
47 | 43 | .522 | ||
43 | 47 | .478 | 4.0 | |
39 | 50 | .438 | 7.5 | |
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