List of Major League Baseball single-season losses leaders

In the sport of baseball, a loss is a statistic credited to the pitcher of the losing team who allows the run that gives the opposing team the lead with which the game is won (the go-ahead run). The losing pitcher is the pitcher who allows the go-ahead run to reach base for a lead that the winning team never relinquishes. If a pitcher allows a run which gives the opposing team the lead, his team comes back to lead or tie the game, and then the opposing team regains the lead against a subsequent pitcher, the earlier pitcher does not get the loss.[1]

John Coleman, the single-season leader in losses.

John Coleman holds the record for most losses in a single-season, losing 48 games in 1883.[2][3][4][5] Will White[6] (42 in 1880), Larry McKeon[7] (41 in 1884), George Bradley[8] (40 in 1879), and Jim McCormick[9] (40 in 1879) are the only other pitchers to lose more than 40 games in a single-season. There has been 50 instances of a pitcher losing more than 30 games in a season, all taking place during the 19th century.[10]

Key
RankRank amongst leaders in single-season wins. A blank field indicates a tie.
PlayerName of player.
LTotal single-season losses.
YearSeason losses were recorded.
* Denotes elected to National Baseball Hall of Fame.

List
Rank Player L Year
1 John Coleman 48 1883
2 Will White 42 1880
3 Larry McKeon 41 1884
4 George Bradley 40 1879
Jim McCormick 40 1879
6 Kid Carsey 37 1891
George Cobb 37 1892
Henry Porter 37 1888
9 Bill Hutchinson 36 1892
Stump Weidman 36 1886
11 Jim Devlin 35 1876
Red Donahue 35 1897
Pud Galvin * 35 1880
Hardie Henderson 35 1885
Fleury Sullivan 35 1884
Adonis Terry 35 1884
17 Mark Baldwin 34 1889
Bob Barr 34 1884
Matt Kilroy 34 1886
Bobby Mathews 34 1876
Al Mays 34 1887
Amos Rusie * 34 1890
23 Jersey Bakley 33 1888
Hardie Henderson 33 1883
Harry McCormick 33 1879
Frank Mountain 33 1883
Lee Richmond 33 1882
Dupee Shaw 33 1884
Jim Whitney 33 1881
30 John Harkins 32 1884
Lee Richmond 32 1880
Jim Whitney 32 1885
Jim Whitney 32 1886
34 Billy Crowell 31 1887
Charles Radbourn * 31 1886
Amos Rusie 31 1892
Rank Player L Year
Dupee Shaw 31 1886
Sam Weaver 31 1878
Will White 31 1879
40 Jersey Bakley 30 1884
Ed Beatin 30 1890
Theodore Breitenstein 30 1895
John Ewing 30 1889
Jim Hughey 30 1899
Jack Lynch 30 1886
Jim McCormick 30 1881
Jim McCormick 30 1882
Toad Ramsey 30 1888
Phenomenal Smith 30 1887
Mickey Welch * 30 1880
51 Tommy Bond 29 1880
Bert Cunningham 29 1888
Red Ehret 29 1889
Pud Galvin * 29 1883
Bill Hart 29 1896
Egyptian Healy 29 1887
Silver King 29 1891
Doc Landis 29 1882
Hank O'Day * 29 1888
Jack Taylor 29 1898
Vic Willis * 29 1905
62 Mark Baldwin 28 1891
Hugh Daily 28 1884
Duke Esper 28 1893
Bill Hill 28 1896
Jim McCormick 28 1880
Hank O'Day * 28 1884
Gus Weyhing 28 1887
69 Mark Baldwin 27 1892
George Bell 27 1910
Charlie Buffinton 27 1885
Bill Carrick 27 1899
Rank Player L Year
Paul Derringer 27 1933
Chick Fraser 27 1896
Pud Galvin * 27 1879
Bill Hart 27 1897
Pink Hawley 27 1894
Tim Keefe * 27 1881
Tim Keefe * 27 1883
Phil Knell 27 1891
Al Mays 27 1886
Tony Mullane 27 1886
Toad Ramsey 27 1886
Toad Ramsey 27 1887
Willie Sudhoff 27 1898
Parke Swartzel 27 1889
Dummy Taylor 27 1901
88 Al Atkinson 26 1884
Theodore Breitenstien 26 1896
Dory Dean 26 1876
George Derby 26 1881
Gus Dorner 26 1906
Pud Galvin * 26 1885
Bob Groom 26 1909
George Haddock 26 1890
Tim Keefe * 26 1882
Frank Killen 26 1892
John Kirby 26 1886
Terry Larkin 26 1878
Tony Mullane 26 1884
Tony Mullane 26 1891
Jack Neagle 26 1884
Lee Richmond 26 1881
Dupee Shaw 26 1885
Harry Staley 26 1889
Happy Townsend 26 1904
Gus Weyhing 26 1898

See also

References
  1. "Losses in Baseball Leaders". Baseball Reference. Retrieved August 2, 2019.
  2. "Single Season Loss Leaders". Baseball Reference. Retrieved August 2, 2019.
  3. "Loss Records". Baseball Almanac. Retrieved August 2, 2019.
  4. "John Coleman Biography". Society For American Baseball Research. Retrieved August 2, 2019.
  5. "John Coleman Career Stats". Baseball Reference. Retrieved August 3, 2019.
  6. "Will White Career Stats". Baseball Reference. Retrieved August 3, 2019.
  7. "Larry McKeon Career Stats". Baseball Reference. Retrieved August 3, 2019.
  8. "George Bradley Career Stats". Baseball Reference. Retrieved August 3, 2019.
  9. "Jim McCormick Career Stats". Baseball Reference. Retrieved August 3, 2019.
  10. "20 Game Losers". Baseball Reference. Retrieved August 2, 2019.
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