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You Are Here > Baseball-Reference.com > Leaders & Records > Single-Season Leaders & Records for Adjusted ERA+
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Single-Season Leaders & Records for Adjusted ERA+
+ - Indicates Hall of Famer. Bold indicates active player.
Only players who finished in the top 40 for the majors in a season will appear on this list. Leaders from the current season are only included for rate stats after July 1st.
Minimum of 3.1 PA/G, 1.0 IP/G, and 0.1 decision/G for single-season leaderboards generally needed for rate statistics. Explanation of min. requirements
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
|---|---|---|---|---|
| 1. | Tim Keefe+ (23) | 294 | 1880 | R |
| 2. | Pedro Martinez (28) | 291 | 2000 | R |
| 3. | Dutch Leonard (22) | 279 | 1914 | L |
| 4. | Greg Maddux (28) | 271 | 1994 | R |
| 5. | Greg Maddux (29) | 262 | 1995 | R |
| 6. | Walter Johnson+ (25) | 259 | 1913 | R |
| 7. | Bob Gibson+ (32) | 258 | 1968 | R |
| 8. | Mordecai Brown+ (29) | 253 | 1906 | R |
| 9. | Pedro Martinez (27) | 243 | 1999 | R |
| 10. | Walter Johnson+ (24) | 242 | 1912 | R |
| 11. | Christy Mathewson+ (24) | 230 | 1905 | R |
| 12. | Dwight Gooden (20) | 228 | 1985 | R |
| 13. | Roger Clemens (42) | 226 | 2005 | R |
| 14. | Pete Alexander+ (28) | 225 | 1915 | R |
| 15. | Christy Mathewson+ (28) | 222 | 1909 | R |
| 16. | Roger Clemens (34) | 221 | 1997 | R |
| 17. | Denny Driscoll (26) | 220 | 1882 | L |
| 18. | Lefty Grove+ (31) | 219 | 1931 | L |
| Pedro Martinez (25) | 219 | 1997 | R | |
| 20. | Kevin Brown (31) | 216 | 1996 | R |
| Jack Pfiester (29) | 216 | 1907 | L | |
| Cy Young+ (34) | 216 | 1901 | R | |
| 23. | Walter Johnson+ (30) | 214 | 1918 | R |
| Walter Johnson+ (31) | 214 | 1919 | R | |
| 25. | Roger Clemens (27) | 213 | 1990 | R |
| 26. | Carl Lundgren (27) | 212 | 1907 | R |
| 27. | Pedro Martinez (31) | 210 | 2003 | R |
| 28. | Ed Reulbach (22) | 209 | 1905 | R |
| 29. | Ron Guidry (27) | 208 | 1978 | L |
| 30. | Charley Radbourn+ (29) | 207 | 1884 | R |
| 31. | Zack Greinke (25) | 205 | 2009 | R |
| Addie Joss+ (28) | 205 | 1908 | R | |
| 33. | Pedro Martinez (30) | 202 | 2002 | R |
| Jack Taylor (28) | 202 | 1902 | R | |
| 35. | Dolf Luque (32) | 201 | 1923 | R |
| 36. | Billy Pierce (28) | 199 | 1955 | L |
| 37. | Dean Chance (23) | 198 | 1964 | R |
| 38. | Spud Chandler (35) | 197 | 1943 | R |
| Randy Johnson (38) | 197 | 2002 | L | |
| Silver King (20) | 197 | 1888 | R | |
| Al Maul (29) | 197 | 1895 | R | |
| 42. | Randy Johnson (33) | 196 | 1997 | L |
| Ed Siever (27) | 196 | 1902 | L | |
| 44. | Hal Newhouser+ (24) | 195 | 1945 | L |
| 45. | Mort Cooper (29) | 194 | 1942 | R |
| Nolan Ryan+ (34) | 194 | 1981 | R | |
| Cy Young+ (41) | 194 | 1908 | R | |
| 48. | Mordecai Brown+ (32) | 193 | 1909 | R |
| Carl Hubbell+ (30) | 193 | 1933 | L | |
| Tom Seaver+ (26) | 193 | 1971 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| 51. | Guy Hecker (26) | 192 | 1882 | R |
| Randy Johnson (31) | 192 | 1995 | L | |
| Monty Stratton (25) | 192 | 1937 | R | |
| 54. | Lefty Gomez+ (28) | 191 | 1937 | L |
| Walter Johnson+ (27) | 191 | 1915 | R | |
| Dazzy Vance+ (37) | 191 | 1928 | R | |
| 57. | Clark Griffith+ (28) | 190 | 1898 | R |
| Sandy Koufax+ (30) | 190 | 1966 | L | |
| 59. | Vean Gregg (26) | 189 | 1911 | L |
| Greg Maddux (31) | 189 | 1997 | R | |
| Amos Rusie+ (23) | 189 | 1894 | R | |
| Dazzy Vance+ (39) | 189 | 1930 | R | |
| Ed Walsh+ (29) | 189 | 1910 | R | |
| 64. | Lefty Grove+ (36) | 188 | 1936 | L |
| Randy Johnson (37) | 188 | 2001 | L | |
| Hal Newhouser+ (25) | 188 | 1946 | L | |
| Billy Rhines (27) | 188 | 1896 | R | |
| Warren Spahn+ (32) | 188 | 1953 | L | |
| Jack Stivetts (21) | 188 | 1889 | R | |
| Wilbur Wood (29) | 188 | 1971 | L | |
| 71. | Sandy Koufax+ (28) | 187 | 1964 | L |
| Greg Maddux (32) | 187 | 1998 | R | |
| Joe Wood (25) | 187 | 1915 | R | |
| 74. | Eddie Cicotte (29) | 186 | 1913 | R |
| Randy Johnson (35) | 186 | 1999 | L | |
| Luis Tiant (27) | 186 | 1968 | R | |
| 77. | Vida Blue (21) | 185 | 1971 | L |
| Lefty Grove+ (30) | 185 | 1930 | L | |
| Lefty Grove+ (39) | 185 | 1939 | L | |
| 80. | Billy Rhines (21) | 184 | 1890 | R |
| John Tudor (31) | 184 | 1985 | L | |
| 82. | Hank Aguirre (31) | 183 | 1962 | L |
| Chris Carpenter (34) | 183 | 2009 | R | |
| Joe Horlen (26) | 183 | 1964 | R | |
| Walter Johnson+ (22) | 183 | 1910 | R | |
| 86. | Harry Brecheen (33) | 182 | 1948 | L |
| Steve Carlton+ (27) | 182 | 1972 | L | |
| Jack Coombs (27) | 182 | 1910 | R | |
| Johan Santana (25) | 182 | 2004 | L | |
| 90. | Henry Boyle (25) | 181 | 1886 | R |
| Russ Ford (31) | 181 | 1914 | R | |
| Randy Johnson (36) | 181 | 2000 | L | |
| Fred Toney (26) | 181 | 1915 | R | |
| 94. | Bret Saberhagen (25) | 180 | 1989 | R |
| 95. | Kevin Appier (25) | 179 | 1993 | R |
| Mordecai Brown+ (30) | 179 | 1907 | R | |
| Phil Niekro+ (28) | 179 | 1967 | R | |
| Jason Schmidt (30) | 179 | 2003 | R | |
| Rube Waddell+ (25) | 179 | 1902 | L | |
| Rube Waddell+ (28) | 179 | 1905 | L | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| 101. | Marvin Freeman (31) | 178 | 1994 | R |
| Max Lanier (27) | 178 | 1943 | L | |
| Orval Overall (28) | 178 | 1909 | R | |
| Mark Prior (22) | 178 | 2003 | R | |
| Joe Wood (22) | 178 | 1912 | R | |
| 106. | Johnny Antonelli (24) | 177 | 1954 | L |
| Roger Clemens (31) | 177 | 1994 | R | |
| Randy Johnson (40) | 177 | 2004 | L | |
| Derek Lowe (29) | 177 | 2002 | R | |
| Andy Pettitte (33) | 177 | 2005 | L | |
| 111. | Johnny Allen (32) | 176 | 1937 | R |
| Fred Anderson (31) | 176 | 1917 | R | |
| Whitey Ford+ (29) | 176 | 1958 | L | |
| Tim Lincecum (25) | 176 | 2009 | R | |
| Cy Young+ (25) | 176 | 1892 | R | |
| 116. | Al Benton (34) | 175 | 1945 | R |
| Eddie Cicotte (35) | 175 | 1919 | R | |
| Roger Clemens (29) | 175 | 1992 | R | |
| Lefty Gomez+ (25) | 175 | 1934 | L | |
| Lefty Grove+ (35) | 175 | 1935 | L | |
| Harry McCormick (26) | 175 | 1882 | R | |
| Tom Seaver+ (28) | 175 | 1973 | R | |
| 123. | Eddie Cicotte (33) | 174 | 1917 | R |
| Roger Clemens (35) | 174 | 1998 | R | |
| Claude Hendrix (25) | 174 | 1914 | R | |
| Felix Hernandez (23) | 174 | 2009 | R | |
| Jack Pfiester (28) | 174 | 1906 | L | |
| Dazzy Vance+ (33) | 174 | 1924 | R | |
| 129. | George Bradley (23) | 173 | 1876 | R |
| Jim Devlin (27) | 173 | 1876 | R | |
| Tim Keefe+ (28) | 173 | 1885 | R | |
| Thornton Lee (34) | 173 | 1941 | L | |
| Ted Lyons+ (41) | 173 | 1942 | R | |
| Dave Righetti (22) | 173 | 1981 | L | |
| Jeff Tesreau (24) | 173 | 1912 | R | |
| Will White (27) | 173 | 1882 | R | |
| Hoyt Wilhelm+ (36) | 173 | 1959 | R | |
| 138. | Walter Johnson+ (23) | 172 | 1911 | R |
| Harry Krause (20) | 172 | 1909 | L | |
| Kid Nichols+ (28) | 172 | 1898 | R | |
| Dave Stieb (27) | 172 | 1985 | R | |
| Charlie Sweeney (21) | 172 | 1884 | R | |
| 143. | Henry Boyle (23) | 171 | 1884 | R |
| Jeff D'Amico (24) | 171 | 2000 | R | |
| Juan Guzman (29) | 171 | 1996 | R | |
| Mel Harder (24) | 171 | 1934 | R | |
| Guy Hecker (28) | 171 | 1884 | R | |
| Ted Lyons+ (38) | 171 | 1939 | R | |
| Greg Maddux (27) | 171 | 1993 | R | |
| Jake Peavy (23) | 171 | 2004 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| 151. | Pete Alexander+ (29) | 170 | 1916 | R |
| David Cone (31) | 170 | 1994 | R | |
| Whitey Ford+ (35) | 170 | 1964 | L | |
| Noodles Hahn (23) | 170 | 1902 | L | |
| Orel Hershiser (26) | 170 | 1985 | R | |
| Al Leiter (32) | 170 | 1998 | L | |
| Al Maul (32) | 170 | 1898 | R | |
| Jim McCormick (26) | 170 | 1883 | R | |
| Kid Nichols+ (27) | 170 | 1897 | R | |
| Gaylord Perry+ (33) | 170 | 1972 | R | |
| Ernie Shore (24) | 170 | 1915 | R | |
| Luis Tiant (31) | 170 | 1972 | R | |
| 163. | Kevin Brown (35) | 169 | 2000 | R |
| Kevin Brown (38) | 169 | 2003 | R | |
| John Candelaria (23) | 169 | 1977 | L | |
| Roger Clemens (23) | 169 | 1986 | R | |
| Red Faber+ (32) | 169 | 1921 | R | |
| Mike Garcia (25) | 169 | 1949 | R | |
| Carl Hubbell+ (33) | 169 | 1936 | L | |
| Tim Lincecum (24) | 169 | 2008 | R | |
| Juan Marichal+ (27) | 169 | 1965 | R | |
| Rube Marquard+ (29) | 169 | 1916 | L | |
| Joe McGinnity+ (33) | 169 | 1904 | R | |
| Jim Palmer+ (29) | 169 | 1975 | R | |
| 175. | Pete Alexander+ (33) | 168 | 1920 | R |
| Danny Darwin (34) | 168 | 1990 | R | |
| Tom Glavine (32) | 168 | 1998 | L | |
| Carl Hubbell+ (31) | 168 | 1934 | L | |
| Cliff Lee (29) | 168 | 2008 | L | |
| Juan Marichal+ (31) | 168 | 1969 | R | |
| Christy Mathewson+ (27) | 168 | 1908 | R | |
| Christy Mathewson+ (30) | 168 | 1911 | R | |
| Wilcy Moore (30) | 168 | 1927 | R | |
| Kid Nichols+ (20) | 168 | 1890 | R | |
| Warren Spahn+ (26) | 168 | 1947 | L | |
| Dizzy Trout (29) | 168 | 1944 | R | |
| Bucky Walters (30) | 168 | 1939 | R | |
| Doc White (27) | 168 | 1906 | L | |
| 189. | Pete Alexander+ (32) | 167 | 1919 | R |
| Gene Bearden (27) | 167 | 1948 | L | |
| Dick Ellsworth (23) | 167 | 1963 | L | |
| Juan Marichal+ (28) | 167 | 1966 | R | |
| Jon Matlack (28) | 167 | 1978 | L | |
| Kevin Millwood (24) | 167 | 1999 | R | |
| Bobo Newsom (32) | 167 | 1940 | R | |
| Steve Ontiveros (33) | 167 | 1994 | R | |
| Ed Walsh+ (28) | 167 | 1909 | R | |
| Vic Willis+ (23) | 167 | 1899 | R | |
| 199. | Allan Anderson (24) | 166 | 1988 | L |
| Ewell Blackwell (24) | 166 | 1947 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Lefty Grove+ (26) | 166 | 1926 | L | |
| Ray Kremer (34) | 166 | 1927 | R | |
| Greg Maddux (26) | 166 | 1992 | R | |
| Johan Santana (29) | 166 | 2008 | L | |
| Herb Score (23) | 166 | 1956 | L | |
| Cy Young+ (35) | 166 | 1902 | R | |
| 207. | Kevin Appier (24) | 165 | 1992 | R |
| Buzz Capra (26) | 165 | 1974 | R | |
| Spud Chandler (38) | 165 | 1946 | R | |
| Sam McDowell (25) | 165 | 1968 | L | |
| Tom Seaver+ (24) | 165 | 1969 | R | |
| Rube Waddell+ (27) | 165 | 1904 | L | |
| Tim Wakefield (28) | 165 | 1995 | R | |
| Brandon Webb (24) | 165 | 2003 | R | |
| 215. | Kevin Brown (33) | 164 | 1998 | R |
| Steve Carlton+ (24) | 164 | 1969 | L | |
| Roger Clemens (28) | 164 | 1991 | R | |
| Stan Coveleski+ (28) | 164 | 1918 | R | |
| Charlie Ferguson (23) | 164 | 1886 | R | |
| Bob Gibson+ (33) | 164 | 1969 | R | |
| Tim Hudson (27) | 164 | 2003 | R | |
| Walter Johnson+ (26) | 164 | 1914 | R | |
| Jimmy Key (26) | 164 | 1987 | L | |
| Howie Pollet (25) | 164 | 1946 | L | |
| Bill Walker (27) | 164 | 1931 | L | |
| Mickey Welch+ (25) | 164 | 1885 | R | |
| 227. | John Clarkson+ (23) | 163 | 1885 | R |
| Dick Donovan (33) | 163 | 1961 | R | |
| Dave Foutz (29) | 163 | 1886 | R | |
| Vern Law (35) | 163 | 1965 | R | |
| Pedro Martinez (26) | 163 | 1998 | R | |
| Earl Moore (23) | 163 | 1903 | R | |
| Mike Mussina (25) | 163 | 1994 | R | |
| Barney Pelty (25) | 163 | 1906 | R | |
| Jose Rijo (28) | 163 | 1993 | R | |
| Amos Rusie+ (26) | 163 | 1897 | R | |
| Ed Walsh+ (27) | 163 | 1908 | R | |
| Lon Warneke (24) | 163 | 1933 | R | |
| 239. | Johnny Beazley (24) | 162 | 1942 | R |
| Steve Carlton+ (35) | 162 | 1980 | L | |
| Bill Doak (23) | 162 | 1914 | R | |
| Bill Hands (29) | 162 | 1969 | R | |
| Teddy Higuera (29) | 162 | 1988 | L | |
| Silver King (22) | 162 | 1890 | R | |
| Greg Maddux (30) | 162 | 1996 | R | |
| Allie Reynolds (35) | 162 | 1952 | R | |
| Elmer Riddle (26) | 162 | 1941 | R | |
| Ben Sheets (25) | 162 | 2004 | R | |
| Scott Stratton (20) | 162 | 1890 | R | |
| Tim Wakefield (35) | 162 | 2002 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Stump Wiedman (20) | 162 | 1881 | R | |
| Joe Wood (21) | 162 | 1911 | R | |
| 253. | Bob Feller+ (21) | 161 | 1940 | R |
| Tommy John (25) | 161 | 1968 | L | |
| Sam McDowell (22) | 161 | 1965 | L | |
| Tony Mullane (31) | 161 | 1890 | R | |
| Hal Newhouser+ (21) | 161 | 1942 | L | |
| Hal Newhouser+ (23) | 161 | 1944 | L | |
| Gary Nolan (24) | 161 | 1972 | R | |
| Johan Santana (27) | 161 | 2006 | L | |
| Mike Scott (31) | 161 | 1986 | R | |
| Don Sutton+ (27) | 161 | 1972 | R | |
| Hippo Vaughn (30) | 161 | 1918 | L | |
| Hippo Vaughn (31) | 161 | 1919 | L | |
| 265. | Bill Bernhard (31) | 160 | 1902 | R |
| George Bradley (27) | 160 | 1880 | R | |
| Mordecai Brown+ (31) | 160 | 1908 | R | |
| Mike Caldwell (29) | 160 | 1978 | L | |
| Curt Davis (30) | 160 | 1934 | R | |
| Jocko Flynn (22) | 160 | 1886 | R | |
| Russ Ford (27) | 160 | 1910 | R | |
| Lefty Grove+ (38) | 160 | 1938 | L | |
| Addie Joss+ (24) | 160 | 1904 | R | |
| Jerry Koosman (26) | 160 | 1969 | L | |
| Dave Koslo (29) | 160 | 1949 | L | |
| Sandy Koufax+ (29) | 160 | 1965 | L | |
| Joe Magrane (23) | 160 | 1988 | L | |
| Christy Mathewson+ (31) | 160 | 1912 | R | |
| Tony Mullane (24) | 160 | 1883 | R | |
| Kid Nichols+ (26) | 160 | 1896 | R | |
| Gary Peters (29) | 160 | 1966 | L | |
| Don Sutton+ (35) | 160 | 1980 | R | |
| Carl Weilman (29) | 160 | 1919 | L | |
| Carlos Zambrano (23) | 160 | 2004 | R | |
| 285. | Cy Blanton (26) | 159 | 1935 | R |
| Garland Braxton (28) | 159 | 1928 | L | |
| Tom Candiotti (33) | 159 | 1991 | R | |
| King Cole (24) | 159 | 1910 | R | |
| David Cone (34) | 159 | 1997 | R | |
| Dizzy Dean+ (24) | 159 | 1934 | R | |
| Ned Garvin (28) | 159 | 1902 | R | |
| Lefty Grove+ (32) | 159 | 1932 | L | |
| Atlee Hammaker (25) | 159 | 1983 | L | |
| Sandy Koufax+ (27) | 159 | 1963 | L | |
| Esteban Loaiza (31) | 159 | 2003 | R | |
| Greg Maddux (36) | 159 | 2002 | R | |
| Daisuke Matsuzaka (27) | 159 | 2008 | R | |
| Rudy May (35) | 159 | 1980 | L | |
| Phil Niekro+ (35) | 159 | 1974 | R | |
| Ed Reulbach (23) | 159 | 1906 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Curt Schilling (36) | 159 | 2003 | R | |
| Bobby Shantz (26) | 159 | 1952 | L | |
| Bill Swift (30) | 159 | 1992 | R | |
| Frank Viola (27) | 159 | 1987 | L | |
| Lon Warneke (23) | 159 | 1932 | R | |
| 306. | Bert Blyleven (22) | 158 | 1973 | R |
| Bob Bowman (28) | 158 | 1939 | R | |
| Howie Camnitz (27) | 158 | 1909 | R | |
| Bob Caruthers (21) | 158 | 1885 | R | |
| Mark Fidrych (21) | 158 | 1976 | R | |
| Chuck Finley (27) | 158 | 1990 | L | |
| Rube Foster (26) | 158 | 1914 | R | |
| Ned Garvin (30) | 158 | 1904 | R | |
| Lefty Grove+ (37) | 158 | 1937 | L | |
| Roy Halladay (25) | 158 | 2002 | R | |
| Jair Jurrjens (23) | 158 | 2009 | R | |
| Willie Mitchell (23) | 158 | 1913 | L | |
| Rick Reuschel (36) | 158 | 1985 | R | |
| Babe Ruth+ (21) | 158 | 1916 | L | |
| Brandon Webb (28) | 158 | 2007 | R | |
| Barry Zito (24) | 158 | 2002 | L | |
| 322. | Pete Alexander+ (40) | 157 | 1927 | R |
| Dick Bosman (25) | 157 | 1969 | R | |
| Ray Collins (23) | 157 | 1910 | L | |
| Russ Ford (28) | 157 | 1911 | R | |
| Pud Galvin+ (27) | 157 | 1884 | R | |
| Sam Leever (31) | 157 | 1903 | R | |
| Dutch Leonard (39) | 157 | 1948 | R | |
| George McQuillan (23) | 157 | 1908 | R | |
| Mike Mussina (23) | 157 | 1992 | R | |
| Mel Parnell (27) | 157 | 1949 | L | |
| Jake Peavy (26) | 157 | 2007 | R | |
| Rick Reuschel (28) | 157 | 1977 | R | |
| Dave Roberts (26) | 157 | 1971 | L | |
| C.C. Sabathia (27) | 157 | 2008 | L | |
| Curt Schilling (34) | 157 | 2001 | R | |
| Chris Short (26) | 157 | 1964 | L | |
| Bob Tewksbury (31) | 157 | 1992 | R | |
| Adam Wainwright (27) | 157 | 2009 | R | |
| Ernie White (24) | 157 | 1941 | L | |
| Whit Wyatt (33) | 157 | 1941 | R | |
| 342. | Sheriff Blake (28) | 156 | 1928 | R |
| Stan Coveleski+ (27) | 156 | 1917 | R | |
| Cy Falkenberg (33) | 156 | 1914 | R | |
| Whitey Ford+ (27) | 156 | 1956 | L | |
| Juan Guzman (25) | 156 | 1992 | R | |
| Teddy Higuera (27) | 156 | 1986 | L | |
| Randy Jones (25) | 156 | 1975 | L | |
| Tim Keefe+ (31) | 156 | 1888 | R | |
| Darryl Kile (28) | 156 | 1997 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Dolf Luque (34) | 156 | 1925 | R | |
| Christy Mathewson+ (29) | 156 | 1910 | R | |
| Jim Palmer+ (27) | 156 | 1973 | R | |
| Johnny Podres (24) | 156 | 1957 | L | |
| Johnny Sain (28) | 156 | 1946 | R | |
| Bob Shawkey (29) | 156 | 1920 | R | |
| Sammy Stewart (26) | 156 | 1981 | R | |
| Will White (28) | 156 | 1883 | R | |
| 359. | Bill Bevens (29) | 155 | 1946 | R |
| Ralph Branca (21) | 155 | 1947 | R | |
| Mordecai Brown+ (33) | 155 | 1910 | R | |
| Eddie Cicotte (32) | 155 | 1916 | R | |
| Ryan Dempster (31) | 155 | 2008 | R | |
| Jesse Duryea (29) | 155 | 1889 | R | |
| Dave Goltz (29) | 155 | 1978 | R | |
| Lefty Grove+ (28) | 155 | 1928 | L | |
| Roy Halladay (32) | 155 | 2009 | R | |
| Pat Hentgen (27) | 155 | 1996 | R | |
| Andy Pettitte (25) | 155 | 1997 | L | |
| Ben Sanders (23) | 155 | 1888 | R | |
| Johan Santana (26) | 155 | 2005 | L | |
| Dizzy Trout (31) | 155 | 1946 | R | |
| 373. | Charlie Buffinton (27) | 154 | 1888 | R |
| Roger Clemens (24) | 154 | 1987 | R | |
| Stan Coveleski+ (30) | 154 | 1920 | R | |
| Don Drysdale+ (20) | 154 | 1957 | R | |
| Bob Feller+ (20) | 154 | 1939 | R | |
| Mike Hampton (26) | 154 | 1999 | L | |
| Randy Johnson (30) | 154 | 1994 | L | |
| Charlie Leibrandt (28) | 154 | 1985 | L | |
| Denny McLain (24) | 154 | 1968 | R | |
| Jim Palmer+ (23) | 154 | 1969 | R | |
| Reb Russell (24) | 154 | 1913 | L | |
| Ray Scarborough (30) | 154 | 1948 | R | |
| Jim Scott (25) | 154 | 1913 | R | |
| Frank Tanana (23) | 154 | 1977 | L | |
| Bucky Walters (31) | 154 | 1940 | R | |
| Hoyt Wilhelm+ (29) | 154 | 1952 | R | |
| Vic Willis+ (30) | 154 | 1906 | R | |
| Early Wynn+ (36) | 154 | 1956 | R | |
| 391. | Babe Adams (37) | 153 | 1919 | R |
| Pete Alexander+ (30) | 153 | 1917 | R | |
| Lady Baldwin (26) | 153 | 1885 | L | |
| Steve Carlton+ (32) | 153 | 1977 | L | |
| John Clarkson+ (27) | 153 | 1889 | R | |
| Mike Cuellar (29) | 153 | 1966 | L | |
| Phil Douglas (32) | 153 | 1922 | R | |
| Bob Feller+ (27) | 153 | 1946 | R | |
| Tom Glavine (25) | 153 | 1991 | L | |
| Ed Lopat (35) | 153 | 1953 | L | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Ted Lyons+ (34) | 153 | 1935 | R | |
| Greg Maddux (34) | 153 | 2000 | R | |
| Dennis Martinez (36) | 153 | 1991 | R | |
| Stu Miller (30) | 153 | 1958 | R | |
| Cy Morgan (31) | 153 | 1910 | R | |
| Eddie Plank+ (39) | 153 | 1915 | L | |
| Jose Rijo (26) | 153 | 1991 | R | |
| Frank Viola (28) | 153 | 1988 | L | |
| Rube Waddell+ (23) | 153 | 1900 | L | |
| Vic Willis+ (25) | 153 | 1901 | R | |
| Cy Young+ (32) | 153 | 1899 | R | |
| 412. | Al Benton (30) | 152 | 1941 | R |
| John Denny (30) | 152 | 1983 | R | |
| Jesse Flores (31) | 152 | 1946 | R | |
| Burleigh Grimes+ (35) | 152 | 1929 | R | |
| Roy Halladay (31) | 152 | 2008 | R | |
| Mel Harder (23) | 152 | 1933 | R | |
| Dennis Martinez (40) | 152 | 1995 | R | |
| Christy Mathewson+ (32) | 152 | 1913 | R | |
| Dave McNally (25) | 152 | 1968 | L | |
| Kid Nichols+ (21) | 152 | 1891 | R | |
| Ray Prim (38) | 152 | 1945 | L | |
| Charley Radbourn+ (28) | 152 | 1883 | R | |
| Robin Roberts+ (26) | 152 | 1953 | R | |
| Preacher Roe (33) | 152 | 1948 | L | |
| Steve Rogers (32) | 152 | 1982 | R | |
| Dutch Ruether (25) | 152 | 1919 | L | |
| Bret Saberhagen (30) | 152 | 1994 | R | |
| Jerry Staley (28) | 152 | 1949 | R | |
| Bill Swift (27) | 152 | 1935 | R | |
| Fred Toney (30) | 152 | 1919 | R | |
| Doc Watson (28) | 152 | 1914 | L | |
| Brandon Webb (27) | 152 | 2006 | R | |
| Joe Wood (20) | 152 | 1910 | R | |
| Cy Young+ (28) | 152 | 1895 | R | |
| 436. | Bert Blyleven (26) | 151 | 1977 | R |
| Tiny Bonham (28) | 151 | 1942 | R | |
| Matt Cain (24) | 151 | 2009 | R | |
| Mike Cuellar (32) | 151 | 1969 | L | |
| Larry Dierker (22) | 151 | 1969 | R | |
| Red Ehret (21) | 151 | 1890 | R | |
| Bob Gibson+ (26) | 151 | 1962 | R | |
| Lefty Grove+ (29) | 151 | 1929 | L | |
| Joe Haynes (29) | 151 | 1947 | R | |
| Addie Joss+ (26) | 151 | 1906 | R | |
| Ray Kremer (33) | 151 | 1926 | R | |
| Sal Maglie (33) | 151 | 1950 | R | |
| Doc McJames (23) | 151 | 1898 | R | |
| Claude Passeau (31) | 151 | 1940 | R | |
| Eddie Plank+ (35) | 151 | 1911 | L | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Nap Rucker (27) | 151 | 1912 | L | |
| Allen Sothoron (26) | 151 | 1919 | R | |
| Billy Taylor (29) | 151 | 1884 | R | |
| Adonis Terry (23) | 151 | 1888 | R | |
| Justin Thompson (24) | 151 | 1997 | L | |
| Jim Turner (33) | 151 | 1937 | R | |
| Wayne Twitchell (25) | 151 | 1973 | R | |
| Ed Walsh+ (26) | 151 | 1907 | R | |
| Perry Werden (18) | 151 | 1884 | R | |
| Dontrelle Willis (23) | 151 | 2005 | L | |
| 461. | Babe Adams (38) | 150 | 1920 | R |
| Bobby Bolin (29) | 150 | 1968 | R | |
| Kevin Brown (32) | 150 | 1997 | R | |
| Steve Carlton+ (36) | 150 | 1981 | L | |
| Stan Coveleski+ (35) | 150 | 1925 | R | |
| Dennis Eckersley+ (24) | 150 | 1979 | R | |
| Dave Foutz (27) | 150 | 1884 | R | |
| Ned Garvin (26) | 150 | 1900 | R | |
| Tex Hughson (28) | 150 | 1944 | R | |
| Bill James (22) | 150 | 1914 | R | |
| Bob Knepper (27) | 150 | 1981 | L | |
| John Lackey (28) | 150 | 2007 | R | |
| Dutch Leonard (38) | 150 | 1947 | R | |
| Steve McCatty (27) | 150 | 1981 | R | |
| Jumbo McGinnis (29) | 150 | 1883 | ||
| Hideo Nomo (26) | 150 | 1995 | R | |
| Jim Palmer+ (26) | 150 | 1972 | R | |
| Howie Pollet (28) | 150 | 1949 | L | |
| Jose Rijo (23) | 150 | 1988 | R | |
| Curt Schilling (25) | 150 | 1992 | R | |
| Curt Schilling (37) | 150 | 2004 | R | |
| Tom Seaver+ (32) | 150 | 1977 | R | |
| Jesse Tannehill (26) | 150 | 1901 | L | |
| Ed Walsh+ (31) | 150 | 1912 | R | |
| 485. | Johnny Allen (31) | 149 | 1936 | R |
| Chief Bender+ (26) | 149 | 1910 | R | |
| Harry Brecheen (30) | 149 | 1945 | L | |
| Ernie Broglio (24) | 149 | 1960 | R | |
| Jim Bunning+ (35) | 149 | 1967 | R | |
| Chris Carpenter (30) | 149 | 2005 | R | |
| John Clarkson+ (24) | 149 | 1886 | R | |
| Don Drysdale+ (27) | 149 | 1964 | R | |
| Bob Ewing (34) | 149 | 1907 | R | |
| Lefty Gomez+ (22) | 149 | 1931 | L | |
| Mark Gubicza (25) | 149 | 1988 | R | |
| Warren Hacker (27) | 149 | 1952 | R | |
| Guy Hecker (29) | 149 | 1885 | R | |
| Bill Hoffer (24) | 149 | 1895 | R | |
| Carl Hubbell+ (29) | 149 | 1932 | L | |
| Walter Johnson+ (36) | 149 | 1924 | R | |
| Rank | Player (age that year) | Adjusted ERA+ | Year | Throws |
| Addie Joss+ (29) | 149 | 1909 | R | |
| Dennis Lamp (28) | 149 | 1981 | R | |
| Jon Matlack (24) | 149 | 1974 | L | |
| Andy Messersmith (29) | 149 | 1975 | R | |
| Earl Moseley (27) | 149 | 1915 | R | |
| Al Orth (28) | 149 | 1901 | R | |
| Roy Oswalt (28) | 149 | 2006 | R | |
| Camilo Pascual (25) | 149 | 1959 | R | |
| Camilo Pascual (29) | 149 | 1963 | R | |
| Gary Peters (26) | 149 | 1963 | L | |
| Jack Powell (22) | 149 | 1897 | R | |
| Toad Ramsey (21) | 149 | 1886 | L | |
| Red Ruffing+ (32) | 149 | 1937 | R | |
| Ed Seward (21) | 149 | 1888 | R | |
| John Smoltz (29) | 149 | 1996 | R | |
| John Tudor (34) | 149 | 1988 | L | |
| Bob Welch (28) | 149 | 1985 | R |
Note that seasons prior to 1876 are not included in single-season marks, but are included in career marks.
