28 pitchers didn't have any losses. The first three are Walter Johnson in 1912, Ed Walsh 2 times in 1908 and Ed Reulbach in 1908.
| NAME | W | L | OPP | SEASON | TM | L% | W% | G | 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 | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | W. Johnson | 9 | 0 |  White Sox | 1912 |  WSH | .000 | 1.000 | 10 | 6 | 0.00 | 51 | 5 | 1 | 1 | 59.0 | 39 | 10 | 0 | 6 | 1 | 4 | 222 | 1 | 7.78 | 0.92 | 8.50 | 0.00 | 23.0 | 2.7 | 0.76 | .238 | 1.53 | 5.95 | ||
| 2 |  | E. Walsh | 9 | 0 |  Red Sox | 1908 | CWS | .000 | 1.000 | 12 | 8 | 51 | 8 | 4 | 3 | 78.2 | 47 | 8 | 0 | 7 | 3 | 4 | 284 | 0 | 5.83 | 0.80 | 7.29 | 0.00 | 18.0 | 2.5 | 0.69 | .211 | 0.92 | 5.38 | |||
| 3 | | E. Walsh | 9 | 0 |  Highlanders | 1908 | CWS | .000 | 1.000 | 10 | 8 | 38 | 8 | 0 | 1 | 76.2 | 52 | 15 | 0 | 13 | 0 | 2 | 292 | 1 | 4.46 | 1.53 | 2.92 | 0.00 | 13.0 | 4.5 | 0.85 | .216 | 1.76 | 6.10 | |||
| 4 | | E. Reulbach | 9 | 0 |  Superbas | 1908 |  CHC | .000 | 1.000 | 9 | 7 | 35 | 6 | 3 | 0 | 69.1 | 42 | 7 | 1 | 26 | 2 | 2 | 260 | 1 | 4.54 | 3.38 | 1.35 | 0.13 | 13.5 | 10.0 | 0.98 | .209 | 0.91 | 5.45 | |||
| 5 | | F. Smith | 9 | 0 |  Senators | 1904 | CWS | .000 | 1.000 | 9 | 8 | 0.74 | 38 | 8 | 3 | 0 | 73.0 | 44 | 6 | 6 | 0 | 13 | 4 | 1 | 3 | 4.68 | 1.60 | 2.92 | 0.00 | 4.8 | 0.78 | .205 | 0.74 | 5.42 | |||
| 6 | | B. Buhl | 8 | 0 |  Dodgers | 1956 |  MIL | .000 | 1.000 | 8 | 7 | 2.26 | 25 | 4 | 1 | 0 | 59.2 | 48 | 15 | 15 | 3 | 27 | 1 | 0 | 1 | 249 | 1 | 3.77 | 4.07 | 0.93 | 0.45 | 10.0 | 10.8 | 1.26 | .233 | 2.26 | 7.24 |
| 7 | | T. Carleton | 8 | 0 |  Bees | 1936 |  CHC | .000 | 1.000 | 8 | 8 | 2.21 | 24 | 7 | 2 | 0 | 73.1 | 68 | 18 | 18 | 4 | 23 | 1 | 0 | 305 | 2 | 2.95 | 2.82 | 1.04 | 0.49 | 7.9 | 7.5 | 1.24 | .253 | 2.21 | 8.35 | |
| 8 | | A. Crowder | 8 | 0 | White Sox | 1932 | WSH | .000 | 1.000 | 8 | 6 | 2.05 | 13 | 5 | 1 | 0 | 57.0 | 50 | 13 | 13 | 0 | 18 | 0 | 2 | 231 | 0 | 2.05 | 2.84 | 0.72 | 0.00 | 5.6 | 7.8 | 1.19 | .250 | 2.05 | 7.89 | |
| 9 | | G. Alexander | 8 | 0 |  Reds | 1916 |  PHN | .000 | 1.000 | 8 | 8 | 0.50 | 34 | 8 | 5 | 0 | 72.0 | 54 | 4 | 5 | 0 | 3 | 2 | 0 | 259 | 0 | 4.25 | 0.38 | 11.33 | 0.00 | 13.1 | 1.2 | 0.79 | .245 | 0.63 | 6.75 | |
| 10 | | C. Weilman | 8 | 0 |  Tigers | 1915 |  SLA | .000 | 1.000 | 10 | 7 | 1.29 | 29 | 7 | 1 | 0 | 76.2 | 47 | 11 | 15 | 1 | 27 | 1 | 3 | 290 | 1 | 3.40 | 3.17 | 1.07 | 0.12 | 10.0 | 9.3 | 0.97 | .198 | 1.76 | 5.52 | |
| 11 | | R. Kroh | 8 | 0 |  Doves | 1909 | CHC | .000 | 1.000 | 9 | 8 | 31 | 8 | 2 | 0 | 75.0 | 50 | 9 | 1 | 16 | 0 | 1 | 284 | 0 | 3.72 | 1.92 | 1.94 | 0.12 | 10.9 | 5.6 | 0.88 | .208 | 1.08 | 6.00 | |||
| 12 | | C. Morgan | 8 | 0 |  Naps | 1909 | TOT | .000 | 1.000 | 8 | 7 | 27 | 7 | 3 | 0 | 67.0 | 46 | 10 | 0 | 17 | 2 | 1 | 247 | 0 | 3.63 | 2.28 | 1.59 | 0.00 | 10.9 | 6.9 | 0.94 | .229 | 1.34 | 6.18 | |||
| 13 | | N. Altrock | 8 | 0 |  Americans | 1906 | CWS | .000 | 1.000 | 8 | 5 | 18 | 5 | 1 | 0 | 63.0 | 46 | 13 | 0 | 8 | 0 | 2 | 3 | 2.57 | 1.14 | 2.25 | 0.00 | 4.7 | 0.86 | .317 | 1.86 | 6.57 | |||||
| 14 | | J. Chesbro | 8 | 0 | Tigers | 1904 | NYH | .000 | 1.000 | 8 | 7 | 1.16 | 38 | 7 | 0 | 0 | 70.0 | 46 | 9 | 10 | 0 | 12 | 0 | 1 | 0 | 4.89 | 1.54 | 3.17 | 0.00 | 4.8 | 0.83 | .229 | 1.29 | 5.91 | |||
| 15 | | J. McGinnity | 8 | 0 |  Beaneaters | 1904 |  NYG | .000 | 1.000 | 8 | 8 | 24 | 7 | 0 | 0 | 69.0 | 59 | 18 | 2 | 15 | 3 | 0 | 279 | 0 | 3.13 | 1.96 | 1.60 | 0.26 | 8.6 | 5.4 | 1.07 | .243 | 2.35 | 7.70 | |||
| 16 | | C. Mathewson | 8 | 0 |  Pirates | 1903 | NYG | .000 | 1.000 | 8 | 7 | 46 | 6 | 1 | 0 | 67.0 | 64 | 20 | 0 | 12 | 2 | 1 | 285 | 3 | 6.18 | 1.61 | 3.83 | 0.00 | 16.1 | 4.2 | 1.13 | .284 | 2.69 | 8.60 | |||
| 17 | | J. McGinnity | 8 | 0 | Superbas | 1903 | NYG | .000 | 1.000 | 9 | 7 | 34 | 7 | 1 | 0 | 67.0 | 41 | 10 | 1 | 15 | 2 | 2 | 261 | 1 | 4.57 | 2.01 | 2.27 | 0.13 | 13.0 | 5.7 | 0.84 | .191 | 1.34 | 5.51 | |||
| 18 | | V. Bend Mizell | 7 | 0 |  Cubs | 1960 | TOT | .000 | 1.000 | 8 | 8 | 2.12 | 35 | 4 | 1 | 0 | 63.2 | 46 | 15 | 15 | 1 | 20 | 0 | 0 | 2 | 247 | 1 | 4.95 | 2.83 | 1.75 | 0.14 | 14.2 | 8.1 | 1.04 | .236 | 2.12 | 6.50 |
| 19 | | F. Lary | 7 | 0 | Yankees | 1958 | DET | .000 | 1.000 | 7 | 7 | 1.46 | 32 | 6 | 2 | 0 | 61.2 | 42 | 10 | 12 | 2 | 14 | 2 | 0 | 0 | 236 | 0 | 4.67 | 2.04 | 2.29 | 0.29 | 13.6 | 5.9 | 0.91 | .215 | 1.75 | 6.13 |
| 20 | | J. Antonelli | 7 | 0 |  Pirates | 1956 | NYG | .000 | 1.000 | 8 | 7 | 1.95 | 32 | 1 | 0 | 0 | 50.2 | 37 | 11 | 13 | 2 | 9 | 1 | 1 | 1 | 199 | 3 | 5.68 | 1.60 | 3.56 | 0.36 | 16.1 | 4.5 | 0.91 | .226 | 2.31 | 6.57 |
| 21 | | P. Roe | 7 | 0 |  Cardinals | 1951 | BKN | .000 | 1.000 | 8 | 8 | 2.25 | 25 | 6 | 1 | 0 | 68.0 | 63 | 17 | 17 | 6 | 13 | 0 | 0 | 260 | 0 | 3.31 | 1.72 | 1.92 | 0.79 | 9.6 | 5.0 | 1.12 | .264 | 2.25 | 8.34 | |
| 22 | | L. Jansen | 7 | 0 |  Braves | 1951 | NYG | .000 | 1.000 | 7 | 6 | 1.80 | 26 | 6 | 1 | 0 | 60.0 | 49 | 12 | 14 | 0 | 10 | 0 | 1 | 236 | 0 | 3.90 | 1.50 | 2.60 | 0.00 | 11.0 | 4.2 | 0.98 | .245 | 2.10 | 7.35 | |
| 23 | | E. Kinder | 7 | 0 | White Sox | 1949 |  BSA | .000 | 1.000 | 7 | 7 | 4.35 | 30 | 5 | 0 | 0 | 62.0 | 71 | 30 | 31 | 5 | 20 | 0 | 0 | 272 | 0 | 4.35 | 2.90 | 1.50 | 0.73 | 11.0 | 7.4 | 1.47 | .304 | 4.50 | 10.31 | |
| 24 | | A. Kellner | 7 | 0 | Browns | 1949 |  PHA | .000 | 1.000 | 7 | 5 | 2.86 | 24 | 5 | 0 | 0 | 56.2 | 53 | 18 | 22 | 2 | 31 | 1 | 2 | 241 | 2 | 3.81 | 4.92 | 0.77 | 0.32 | 10.0 | 12.9 | 1.48 | .279 | 3.49 | 8.42 | |
| 25 | | R. Sewell | 7 | 0 |  Cubs | 1948 | PIT | .000 | 1.000 | 8 | 8 | 2.35 | 18 | 5 | 0 | 0 | 61.1 | 54 | 16 | 18 | 5 | 16 | 1 | 0 | 255 | 1 | 2.64 | 2.35 | 1.13 | 0.73 | 7.1 | 6.3 | 1.14 | .228 | 2.64 | 7.92 | |
StatMuse has game-level data for pitcher losses and pitcher wins going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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