Since 1900, Walter Johnson and Irv Young are tied for losing the most games in a month, with 9 games.
| NAME | L | MONTH | W | L% | G | 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 | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | W. Johnson | 9 | July 1909 | 1 | .900 | 10 | .100 | 10 | 48 | 7 | 0 | 0 | 71.1 | 69 | 38 | 0 | 15 | 2 | 0 | 298 | 3 | 6.06 | 1.89 | 3.20 | 0.00 | 16.1 | 5.0 | 1.18 | .296 | 4.79 | 8.71 | |||
| 2 |  | I. Young | 9 | July 1907 | 0 | 1.000 | 10 | .000 | 8 | 17 | 6 | 0 | 1 | 60.1 | 78 | 43 | 1 | 15 | 3 | 2 | 265 | 1 | 2.54 | 2.24 | 1.13 | 0.15 | 6.4 | 5.7 | 1.54 | .336 | 6.41 | 11.64 | |||
| 3 | | W. Wood | 8 | June 1973 | 1 | .889 | 9 | .111 | 9 | 4.43 | 42 | 5 | 0 | 0 | 69.0 | 78 | 34 | 38 | 10 | 23 | 1 | 0 | 2 | 300 | 1 | 5.48 | 3.00 | 1.83 | 1.30 | 14.0 | 7.7 | 1.46 | .304 | 4.96 | 10.17 |
| 4 | | S. Perry | 8 | June 1918 | 1 | .889 | 9 | .111 | 8 | 3.65 | 22 | 8 | 0 | 0 | 69.0 | 81 | 28 | 30 | 1 | 22 | 0 | 0 | 288 | 2 | 2.87 | 2.87 | 1.00 | 0.13 | 7.6 | 7.6 | 1.49 | .329 | 3.91 | 10.57 | |
| 5 | | B. Brown | 8 | July 1910 | 1 | .889 | 10 | .111 | 7 | 25 | 5 | 1 | 1 | 63.2 | 52 | 28 | 2 | 18 | 1 | 2 | 244 | 4 | 3.53 | 2.54 | 1.39 | 0.28 | 10.2 | 7.4 | 1.10 | .253 | 3.96 | 7.35 | |||
| 6 | | B. Hogg | 8 | August 1908 | 0 | 1.000 | 8 | .000 | 8 | 25 | 3 | 0 | 0 | 51.1 | 46 | 28 | 2 | 27 | 0 | 0 | 223 | 1 | 4.38 | 4.73 | 0.93 | 0.35 | 11.2 | 12.1 | 1.42 | .260 | 4.91 | 8.06 | |||
| 7 | | G. Dorner | 8 | August 1906 | 1 | .889 | 9 | .111 | 8 | 24 | 8 | 0 | 0 | 67.2 | 80 | 49 | 1 | 27 | 6 | 1 | 302 | 1 | 3.19 | 3.59 | 0.89 | 0.13 | 7.9 | 8.9 | 1.58 | .324 | 6.52 | 10.64 | |||
| 8 | | A. Stimmel | 8 | September 1901 | 1 | .889 | 9 | .111 | 9 | 4.48 | 25 | 7 | 0 | 0 | 68.1 | 83 | 34 | 48 | 7 | 24 | 4 | 0 | 2 | 3.29 | 3.16 | 1.04 | 0.92 | 9.5 | 1.57 | .396 | 6.32 | 10.93 | |||
| 9 | | H. Howell | 8 | August 1901 | 2 | .800 | 10 | .200 | 10 | 4.27 | 15 | 9 | 1 | 0 | 80.0 | 98 | 54 | 1 | 19 | 4 | 0 | 1 | 1.69 | 2.14 | 0.79 | 0.11 | 5.4 | 1.46 | .312 | 6.08 | 11.03 | ||||
| 10 | | K. Atherton | 7 | August 1986 | 0 | 1.000 | 13 | .000 | 0 | 5.59 | 13 | 0 | 0 | 0 | 19.1 | 23 | 12 | 15 | 5 | 11 | 1 | 8 | 2 | 92 | 1 | 6.05 | 5.12 | 1.18 | 2.33 | 14.1 | 12.0 | 1.76 | .290 | 6.98 | 10.71 |
| 11 | | J. Jefferson | 7 | August 1980 | 0 | 1.000 | 8 | .000 | 6 | 8.10 | 15 | 0 | 0 | 0 | 33.1 | 39 | 30 | 32 | 2 | 18 | 2 | 1 | 1 | 153 | 0 | 4.05 | 4.86 | 0.83 | 0.54 | 9.8 | 11.8 | 1.71 | .319 | 8.64 | 10.53 |
| 12 | | J. Koosman | 7 | August 1977 | 0 | 1.000 | 7 | .000 | 7 | 4.60 | 32 | 2 | 0 | 0 | 47.0 | 53 | 24 | 28 | 5 | 18 | 1 | 0 | 5 | 204 | 0 | 6.13 | 3.45 | 1.78 | 0.96 | 15.7 | 8.8 | 1.51 | .324 | 5.36 | 10.15 |
| 13 | | D. Freisleben | 7 | July 1976 | 0 | 1.000 | 8 | .000 | 7 | 6.37 | 14 | 0 | 0 | 1 | 35.1 | 42 | 25 | 27 | 3 | 20 | 2 | 1 | 1 | 163 | 1 | 3.57 | 5.09 | 0.70 | 0.76 | 8.6 | 12.3 | 1.75 | .315 | 6.88 | 10.70 |
| 14 | | D. Ellsworth | 7 | July 1966 | 1 | .875 | 8 | .125 | 8 | 8.25 | 25 | 1 | 0 | 0 | 48.0 | 73 | 44 | 49 | 10 | 12 | 2 | 0 | 3 | 230 | 1 | 4.69 | 2.25 | 2.08 | 1.88 | 10.9 | 5.2 | 1.77 | .348 | 9.19 | 13.69 |
| 15 | | R. Craig | 7 | July 1963 | 0 | 1.000 | 9 | .000 | 7 | 4.47 | 10 | 5 | 0 | 0 | 46.1 | 42 | 23 | 30 | 6 | 11 | 0 | 2 | 0 | 191 | 2 | 1.94 | 2.14 | 0.91 | 1.17 | 5.2 | 5.8 | 1.14 | .220 | 5.83 | 8.16 |
| 16 | | R. Craig | 7 | July 1962 | 1 | .875 | 8 | .125 | 7 | 4.15 | 28 | 3 | 0 | 0 | 52.0 | 52 | 24 | 27 | 9 | 13 | 2 | 1 | 0 | 212 | 1 | 4.85 | 2.25 | 2.15 | 1.56 | 13.2 | 6.1 | 1.25 | .269 | 4.67 | 9.00 |
| 17 | | J. Schmitz | 7 | June 1947 | 0 | 1.000 | 8 | .000 | 5 | 5.40 | 23 | 0 | 0 | 1 | 33.1 | 42 | 20 | 26 | 3 | 10 | 0 | 3 | 156 | 2 | 6.21 | 2.70 | 2.30 | 0.81 | 14.7 | 6.4 | 1.56 | .325 | 7.02 | 11.34 | |
| 18 | | E. Wynn | 7 | July 1944 | 0 | 1.000 | 9 | .000 | 6 | 6.28 | 15 | 3 | 0 | 0 | 43.0 | 63 | 30 | 36 | 1 | 17 | 1 | 2 | 205 | 1 | 3.14 | 3.56 | 0.88 | 0.21 | 7.3 | 8.3 | 1.86 | .363 | 7.53 | 13.19 | |
| 19 | | H. Mulcahy | 7 | August 1940 | 0 | 1.000 | 7 | .000 | 7 | 4.88 | 11 | 2 | 0 | 0 | 48.0 | 54 | 26 | 33 | 3 | 13 | 0 | 0 | 209 | 1 | 2.06 | 2.44 | 0.85 | 0.56 | 5.3 | 6.2 | 1.40 | .280 | 6.19 | 10.13 | |
| 20 | | M. Butcher | 7 | September 1938 | 0 | 1.000 | 7 | .000 | 7 | 3.81 | 17 | 6 | 0 | 0 | 54.1 | 52 | 23 | 28 | 4 | 19 | 2 | 0 | 235 | 0 | 2.82 | 3.15 | 0.89 | 0.66 | 7.2 | 8.1 | 1.31 | .249 | 4.64 | 8.61 | |
| 21 | | J. Bowman | 7 | August 1936 | 0 | 1.000 | 9 | .000 | 6 | 6.41 | 13 | 3 | 0 | 0 | 46.1 | 64 | 33 | 37 | 2 | 10 | 1 | 1 | 212 | 1 | 2.53 | 1.94 | 1.30 | 0.39 | 6.1 | 4.7 | 1.60 | .333 | 7.19 | 12.43 | |
| 22 | | C. Passeau | 7 | August 1936 | 2 | .778 | 10 | .222 | 8 | 3.45 | 15 | 3 | 1 | 0 | 60.0 | 65 | 23 | 34 | 0 | 16 | 2 | 1 | 257 | 0 | 2.25 | 2.40 | 0.94 | 0.00 | 5.8 | 6.2 | 1.35 | .290 | 5.10 | 9.75 | |
| 23 | | P. Derringer | 7 | July 1933 | 1 | .875 | 9 | .125 | 8 | 2.11 | 24 | 4 | 0 | 1 | 55.1 | 53 | 13 | 22 | 1 | 10 | 2 | 1 | 224 | 1 | 3.90 | 1.63 | 2.40 | 0.16 | 10.7 | 4.5 | 1.14 | .278 | 3.58 | 8.62 | |
| 24 | | R. Benge | 7 | July 1933 | 0 | 1.000 | 8 | .000 | 8 | 4.07 | 18 | 2 | 0 | 0 | 55.1 | 64 | 25 | 30 | 3 | 8 | 1 | 0 | 235 | 0 | 2.93 | 1.30 | 2.25 | 0.49 | 7.7 | 3.4 | 1.30 | .298 | 4.88 | 10.41 | |
| 25 | | G. Blaeholder | 7 | June 1933 | 3 | .700 | 10 | .300 | 9 | 5.82 | 18 | 3 | 0 | 0 | 60.1 | 77 | 39 | 47 | 9 | 16 | 0 | 1 | 264 | 1 | 2.69 | 2.39 | 1.13 | 1.34 | 6.8 | 6.1 | 1.54 | .308 | 7.01 | 11.49 | |
StatMuse has game-level data for pitcher losses going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
66 | 45 | .595 | ||
58 | 53 | .523 | 8.0 | |
57 | 55 | .509 | 9.5 | |
55 | 57 | .491 | 11.5 | |
47 | 65 | .420 | 19.5 | |
| NL Central | W | L | PCT | GB |
69 | 41 | .627 | ||
63 | 48 | .568 | 6.5 | |
56 | 56 | .500 | 14.0 | |
54 | 57 | .486 | 15.5 | |
52 | 58 | .473 | 17.0 | |
| NL West | W | L | PCT | GB |
69 | 42 | .622 | ||
59 | 52 | .532 | 10.0 | |
57 | 54 | .514 | 12.0 | |
47 | 64 | .423 | 22.0 | |
44 | 67 | .396 | 25.0 |
Braves
Phillies
Marlins
Nationals
Mets
Cubs
Pirates
Cardinals
Reds
Dodgers
Diamondbacks
Padres
Giants
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
65 | 45 | .591 | ||
62 | 49 | .559 | 3.5 | |
59 | 51 | .536 | 6.0 | |
54 | 57 | .486 | 11.5 | |
52 | 59 | .468 | 13.5 | |
| AL Central | W | L | PCT | GB |
58 | 52 | .527 | ||
56 | 56 | .500 | 3.0 | |
56 | 56 | .500 | 3.0 | |
53 | 58 | .477 | 5.5 | |
46 | 66 | .411 | 13.0 | |
| AL West | W | L | PCT | GB |
57 | 55 | .509 | ||
55 | 56 | .495 | 1.5 | |
54 | 58 | .482 | 3.0 | |
45 | 66 | .405 | 11.5 | |
42 | 69 | .378 | 14.5 |
Rays
Yankees
Red Sox
Orioles
Blue Jays
Astros
Rangers
Athletics
Angels