The best single pitching seasons by players 25 and under, 1871 to 2025, ranked by ERA+ (100 x league ERA / pitcher ERA, same league-season, no park adjustment). The top season: Devin Williams, age 25, 2020 (ERA+ 1340). Filter by era below; every row with a committed career page links to it, and players outside our top-3,500 career-page set render as plain names.
Showing 173 of 173 ranked seasons
| # | Player | Age | Year | Team | ERA+ | ERA | W | L | SV | SO | IP | K/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Devin Williams | 25 | 2020 | MIL | 1340 | 0.33 | 4 | 1 | 0 | 53 | 27 | 17.7 |
| 2 | Jonathan Papelbon | 25 | 2006 | BOS | 494 | 0.92 | 4 | 2 | 35 | 75 | 68.3 | 9.9 |
| 3 | Craig Kimbrel | 24 | 2012 | ATL | 392 | 1.01 | 3 | 1 | 42 | 116 | 62.7 | 16.7 |
| 4 | Laurie Reis | 18 | 1877 | CHN | 374 | 0.75 | 3 | 1 | 0 | 11 | 36 | 2.8 |
| 5 | Brusdar Graterol | 24 | 2023 | LAN | 364 | 1.2 | 4 | 2 | 7 | 48 | 67.3 | 6.4 |
| 6 | Dale Murray | 24 | 1974 | MON | 350 | 1.03 | 1 | 1 | 10 | 31 | 69.7 | 4.0 |
| 7 | Tanner Scott | 25 | 2020 | BAL | 339 | 1.31 | 0 | 0 | 1 | 23 | 20.7 | 10.0 |
| 8 | Victor Gonzalez | 24 | 2020 | LAN | 336 | 1.33 | 3 | 0 | 0 | 23 | 20.3 | 10.2 |
| 9 | Emmanuel Clase | 23 | 2021 | CLE | 334 | 1.29 | 4 | 5 | 24 | 74 | 69.7 | 9.6 |
| 10 | Ugueth Urbina | 24 | 1998 | MON | 326 | 1.3 | 6 | 3 | 34 | 94 | 69.3 | 12.2 |
| 11 | Carlos Marmol | 24 | 2007 | CHN | 310 | 1.43 | 5 | 1 | 1 | 96 | 69.3 | 12.5 |
| 12 | Ranger Suarez | 25 | 2021 | PHI | 309 | 1.36 | 8 | 5 | 4 | 107 | 106 | 9.1 |
| 13 | Craig Kimbrel | 25 | 2013 | ATL | 309 | 1.21 | 4 | 3 | 50 | 98 | 67 | 13.2 |
| 14 | Nick Maddox | 20 | 1907 | PIT | 296 | 0.83 | 5 | 1 | 0 | 38 | 54 | 6.3 |
| 15 | Bruce Sutter | 24 | 1977 | CHN | 291 | 1.34 | 7 | 3 | 31 | 129 | 107.3 | 10.8 |
| 16 | Ferdie Schupp | 25 | 1916 | NY1 | 291 | 0.9 | 9 | 3 | 1 | 86 | 140.3 | 5.5 |
| 17 | Codi Heuer | 23 | 2020 | CHA | 291 | 1.52 | 3 | 0 | 1 | 25 | 23.7 | 9.5 |
| 18 | Emmanuel Clase | 24 | 2022 | CLE | 285 | 1.36 | 3 | 4 | 42 | 77 | 72.7 | 9.5 |
| 19 | Terry Fox | 25 | 1961 | DET | 285 | 1.41 | 5 | 2 | 12 | 32 | 57.3 | 5.0 |
| 20 | Dutch Leonard | 22 | 1914 | BOS | 284 | 0.96 | 19 | 5 | 3 | 176 | 224.7 | 7.1 |
| 21 | Kyle Cody | 25 | 2020 | TEX | 278 | 1.59 | 1 | 1 | 0 | 18 | 22.7 | 7.1 |
| 22 | Tim Keefe | 23 | 1880 | TRN | 277 | 0.86 | 6 | 6 | 0 | 39 | 105 | 3.3 |
| 23 | Jose Leclerc | 24 | 2018 | TEX | 273 | 1.56 | 2 | 3 | 12 | 85 | 57.7 | 13.3 |
| 24 | Oscar Tuero | 24 | 1918 | SLN | 272 | 1.02 | 1 | 2 | 0 | 13 | 44.3 | 2.6 |
| 25 | Shane Bieber | 25 | 2020 | CLE | 271 | 1.63 | 8 | 1 | 0 | 122 | 77.3 | 14.2 |
| 26 | Joakim Soria | 24 | 2008 | KCA | 271 | 1.6 | 2 | 3 | 42 | 66 | 67.3 | 8.8 |
| 27 | Kelvin Herrera | 24 | 2014 | KCA | 270 | 1.41 | 4 | 3 | 0 | 59 | 70 | 7.6 |
| 28 | Red Munger | 25 | 1944 | SLN | 270 | 1.34 | 11 | 3 | 2 | 55 | 121 | 4.1 |
| 29 | Jose Arredondo | 24 | 2008 | LAA | 268 | 1.62 | 10 | 2 | 0 | 55 | 61 | 8.1 |
| 30 | Ken Tatum | 25 | 1969 | CAL | 267 | 1.36 | 7 | 2 | 22 | 65 | 86.3 | 6.8 |
| 31 | Bryan Garcia | 25 | 2020 | DET | 266 | 1.66 | 2 | 1 | 4 | 12 | 21.7 | 5.0 |
| 32 | Francisco Rodriguez | 24 | 2006 | LAA | 264 | 1.73 | 2 | 3 | 47 | 98 | 73 | 12.1 |
| 33 | Aroldis Chapman | 24 | 2012 | CIN | 262 | 1.51 | 5 | 5 | 38 | 122 | 71.7 | 15.3 |
| 34 | Felipe Vazquez | 25 | 2017 | PIT | 259 | 1.67 | 5 | 3 | 21 | 88 | 75.3 | 10.5 |
| 35 | Tyler Glasnow | 25 | 2019 | TBA | 259 | 1.78 | 6 | 1 | 0 | 76 | 60.7 | 11.3 |
| 36 | Walter Johnson | 25 | 1913 | WS1 | 256 | 1.14 | 36 | 7 | 2 | 243 | 346 | 6.3 |
| 37 | Francisco Rodriguez | 22 | 2004 | ANA | 254 | 1.82 | 4 | 1 | 12 | 123 | 84 | 13.2 |
| 38 | Rafael Perez | 25 | 2007 | CLE | 253 | 1.78 | 1 | 2 | 1 | 62 | 60.7 | 9.2 |
| 39 | Abner Uribe | 25 | 2025 | MIL | 252 | 1.67 | 3 | 2 | 7 | 90 | 75.3 | 10.8 |
| 40 | Huston Street | 21 | 2005 | OAK | 252 | 1.72 | 5 | 1 | 23 | 72 | 78.3 | 8.3 |
| 41 | Steve Howe | 25 | 1983 | LAN | 252 | 1.44 | 4 | 7 | 18 | 52 | 68.7 | 6.8 |
| 42 | Archie Bradley | 24 | 2017 | ARI | 251 | 1.73 | 3 | 3 | 1 | 79 | 73 | 9.7 |
| 43 | John Weyhing | 19 | 1888 | CN2 | 248 | 1.23 | 3 | 4 | 0 | 30 | 65.7 | 4.1 |
| 44 | Frank Linzy | 24 | 1965 | SFN | 247 | 1.43 | 9 | 3 | 21 | 35 | 81.7 | 3.9 |
| 45 | Mel Rojas | 25 | 1992 | MON | 245 | 1.43 | 7 | 1 | 10 | 70 | 100.7 | 6.3 |
| 46 | Luis Avilan | 23 | 2013 | ATL | 245 | 1.52 | 5 | 0 | 0 | 38 | 65 | 5.3 |
| 47 | Corey Knebel | 25 | 2017 | MIL | 244 | 1.78 | 1 | 4 | 39 | 126 | 76 | 14.9 |
| 48 | Mark Eichhorn | 25 | 1986 | TOR | 243 | 1.72 | 14 | 6 | 10 | 166 | 157 | 9.5 |
| 49 | Bob Apodaca | 25 | 1975 | NYN | 243 | 1.49 | 3 | 4 | 13 | 45 | 84.7 | 4.8 |
| 50 | Troy Percival | 25 | 1995 | CAL | 242 | 1.95 | 3 | 2 | 3 | 94 | 74 | 11.4 |
| 51 | Andrew Bailey | 25 | 2009 | OAK | 242 | 1.84 | 6 | 3 | 26 | 91 | 83.3 | 9.8 |
| 52 | Rich Gossage | 25 | 1977 | PIT | 241 | 1.62 | 11 | 9 | 26 | 151 | 133 | 10.2 |
| 53 | Chris Perez | 24 | 2010 | CLE | 241 | 1.71 | 2 | 2 | 23 | 61 | 63 | 8.7 |
| 54 | Walter Johnson | 24 | 1912 | WS1 | 240 | 1.39 | 33 | 12 | 2 | 303 | 369 | 7.4 |
| 55 | Daniel Hudson | 23 | 2010 | ARI | 237 | 1.69 | 7 | 1 | 0 | 70 | 79.7 | 7.9 |
| 56 | Steve Rogers | 23 | 1973 | MON | 237 | 1.54 | 10 | 5 | 0 | 64 | 134 | 4.3 |
| 57 | Dwight Gooden | 20 | 1985 | NYN | 235 | 1.53 | 24 | 4 | 0 | 268 | 276.7 | 8.7 |
| 58 | Christy Mathewson | 24 | 1905 | NY1 | 235 | 1.28 | 31 | 9 | 3 | 206 | 338.7 | 5.5 |
| 59 | Joel Zumaya | 21 | 2006 | DET | 234 | 1.94 | 6 | 3 | 1 | 97 | 83.3 | 10.5 |
| 60 | Alex Torres | 25 | 2013 | TBA | 234 | 1.71 | 4 | 2 | 0 | 62 | 58 | 9.6 |
| 61 | Zach Duke | 22 | 2005 | PIT | 233 | 1.81 | 8 | 2 | 0 | 58 | 84.7 | 6.2 |
| 62 | Chad Cordero | 23 | 2005 | WAS | 232 | 1.82 | 2 | 4 | 47 | 61 | 74.3 | 7.4 |
| 63 | Gregg Olson | 22 | 1989 | BAL | 229 | 1.69 | 5 | 2 | 27 | 90 | 85 | 9.5 |
| 64 | Jorge Julio | 23 | 2002 | BAL | 225 | 1.99 | 5 | 6 | 25 | 55 | 68 | 7.3 |
| 65 | Neal Cotts | 25 | 2005 | CHA | 224 | 1.94 | 4 | 0 | 0 | 58 | 60.3 | 8.7 |
| 66 | Carmen Hill | 22 | 1918 | PIT | 223 | 1.24 | 2 | 3 | 0 | 15 | 43.7 | 3.1 |
| 67 | Pedro Martinez | 25 | 1997 | MON | 221 | 1.9 | 17 | 8 | 0 | 305 | 241.3 | 11.4 |
| 68 | Frank Killen | 20 | 1891 | ML3 | 221 | 1.68 | 7 | 4 | 0 | 38 | 96.7 | 3.5 |
| 69 | Hippo Vaughn | 25 | 1913 | CHN | 221 | 1.45 | 5 | 1 | 0 | 36 | 56 | 5.8 |
| 70 | Kevin Saucier | 24 | 1981 | DET | 221 | 1.65 | 4 | 2 | 13 | 23 | 49 | 4.2 |
| 71 | Dean Chance | 23 | 1964 | LAA | 220 | 1.65 | 20 | 9 | 4 | 207 | 278.3 | 6.7 |
| 72 | Cal Eldred | 24 | 1992 | ML4 | 220 | 1.79 | 11 | 2 | 0 | 62 | 100.3 | 5.6 |
| 73 | Joel Pineiro | 22 | 2001 | SEA | 220 | 2.03 | 6 | 2 | 0 | 56 | 75.3 | 6.7 |
| 74 | Lee Smith | 25 | 1983 | CHN | 219 | 1.65 | 4 | 10 | 29 | 91 | 103.3 | 7.9 |
| 75 | Al Hrabosky | 25 | 1975 | SLN | 218 | 1.66 | 13 | 3 | 22 | 82 | 97.3 | 7.6 |
| 76 | Steve Ontiveros | 24 | 1985 | OAK | 215 | 1.93 | 1 | 3 | 8 | 36 | 74.7 | 4.3 |
| 77 | Ed Reulbach | 22 | 1905 | CHN | 211 | 1.42 | 18 | 14 | 1 | 152 | 291.7 | 4.7 |
| 78 | Rich Gossage | 23 | 1975 | CHA | 205 | 1.84 | 9 | 8 | 26 | 130 | 141.7 | 8.3 |
| 79 | Duster Mails | 25 | 1920 | CLE | 205 | 1.85 | 7 | 0 | 0 | 25 | 63.3 | 3.6 |
| 80 | Gordon Jones | 24 | 1954 | SLN | 204 | 2.0 | 4 | 4 | 0 | 48 | 81 | 5.3 |
| 81 | Scott Radinsky | 23 | 1991 | CHA | 203 | 2.02 | 5 | 5 | 8 | 49 | 71.3 | 6.2 |
| 82 | Ed Doheny | 23 | 1897 | NY1 | 203 | 2.12 | 4 | 4 | 0 | 37 | 85 | 3.9 |
| 83 | Byung-Hyun Kim | 23 | 2002 | ARI | 202 | 2.04 | 8 | 3 | 36 | 92 | 84 | 9.9 |
| 84 | Mark Wohlers | 25 | 1995 | ATL | 200 | 2.09 | 7 | 3 | 25 | 90 | 64.7 | 12.5 |
| 85 | Randy Myers | 25 | 1988 | NYN | 200 | 1.72 | 7 | 3 | 26 | 69 | 68 | 9.1 |
| 86 | Rod Beck | 23 | 1992 | SFN | 199 | 1.76 | 3 | 3 | 17 | 87 | 92 | 8.5 |
| 87 | Al Spalding | 21 | 1872 | BS1 | 198 | 1.85 | 38 | 8 | 0 | 28 | 404.7 | 0.6 |
| 88 | Smoky Joe Wood | 25 | 1915 | BOS | 197 | 1.49 | 15 | 5 | 2 | 63 | 157.3 | 3.6 |
| 89 | Ken Ryan | 25 | 1994 | BOS | 197 | 2.44 | 2 | 3 | 13 | 32 | 48 | 6.0 |
| 90 | Julian Tavarez | 22 | 1995 | CLE | 194 | 2.44 | 10 | 2 | 0 | 68 | 85 | 7.2 |
| 91 | Don Gross | 25 | 1956 | CIN | 194 | 1.95 | 3 | 0 | 0 | 47 | 69.3 | 6.1 |
| 92 | Lefty Gomez | 25 | 1934 | NYA | 193 | 2.33 | 26 | 5 | 1 | 158 | 281.7 | 5.0 |
| 93 | Howie Pollet | 22 | 1943 | SLN | 193 | 1.75 | 8 | 4 | 0 | 61 | 118.3 | 4.6 |
| 94 | Amos Rusie | 23 | 1894 | NY1 | 192 | 2.78 | 36 | 13 | 1 | 195 | 444 | 4.0 |
| 95 | Charlie Sweeney | 21 | 1884 | PRO | 192 | 1.55 | 17 | 8 | 1 | 145 | 221 | 5.9 |
| 96 | Monty Stratton | 25 | 1937 | CHA | 192 | 2.4 | 15 | 5 | 0 | 69 | 164.7 | 3.8 |
| 97 | Antonio Osuna | 24 | 1997 | LAN | 192 | 2.19 | 3 | 4 | 0 | 68 | 61.7 | 9.9 |
| 98 | Gregg Olson | 25 | 1992 | BAL | 192 | 2.05 | 1 | 5 | 36 | 58 | 61.3 | 8.5 |
| 99 | Don Mossi | 25 | 1954 | CLE | 192 | 1.94 | 6 | 1 | 7 | 55 | 93 | 5.3 |
| 100 | Marius Russo | 24 | 1939 | NYA | 192 | 2.41 | 8 | 3 | 2 | 55 | 116 | 4.3 |
| 101 | Jim Mooney | 24 | 1931 | NY1 | 192 | 2.01 | 7 | 1 | 0 | 38 | 71.7 | 4.8 |
| 102 | Pud Galvin | 18 | 1875 | SL2 | 192 | 1.16 | 4 | 2 | 1 | 8 | 62 | 1.2 |
| 103 | Tom Niedenfuer | 23 | 1983 | LAN | 191 | 1.9 | 8 | 3 | 11 | 66 | 94.7 | 6.3 |
| 104 | Vida Blue | 21 | 1971 | OAK | 190 | 1.82 | 24 | 8 | 0 | 301 | 312 | 8.7 |
| 105 | Claude Hendrix | 25 | 1914 | CHF | 190 | 1.69 | 29 | 10 | 5 | 189 | 362 | 4.7 |
| 106 | George McQuillan | 25 | 1910 | PHI | 190 | 1.6 | 9 | 6 | 1 | 71 | 152.3 | 4.2 |
| 107 | Jake Peavy | 23 | 2004 | SDN | 189 | 2.27 | 15 | 6 | 0 | 173 | 166.3 | 9.4 |
| 108 | Scott Williamson | 23 | 1999 | CIN | 189 | 2.41 | 12 | 7 | 19 | 107 | 93.3 | 10.3 |
| 109 | Chuck McElroy | 23 | 1991 | CHN | 189 | 1.95 | 6 | 2 | 3 | 92 | 101.3 | 8.2 |
| 110 | Rob Dibble | 24 | 1988 | CIN | 189 | 1.82 | 1 | 1 | 0 | 59 | 59.3 | 8.9 |
| 111 | George Bradley | 23 | 1876 | SL3 | 188 | 1.23 | 45 | 19 | 0 | 103 | 573 | 1.6 |
| 112 | Hector Carrasco | 24 | 1994 | CIN | 188 | 2.24 | 5 | 6 | 6 | 41 | 56.3 | 6.6 |
| 113 | Howie Pollet | 20 | 1941 | SLN | 188 | 1.93 | 5 | 2 | 0 | 37 | 70 | 4.8 |
| 114 | Silver King | 20 | 1888 | SL4 | 187 | 1.63 | 45 | 20 | 0 | 258 | 584.7 | 4.0 |
| 115 | Henry Boyle | 25 | 1886 | SL5 | 187 | 1.76 | 9 | 15 | 0 | 101 | 210 | 4.3 |
| 116 | Rod Beck | 24 | 1993 | SFN | 187 | 2.16 | 3 | 1 | 48 | 86 | 79.3 | 9.8 |
| 117 | Dave Smith | 25 | 1980 | HOU | 187 | 1.93 | 7 | 5 | 10 | 85 | 102.7 | 7.5 |
| 118 | Billy Koch | 25 | 2000 | TOR | 187 | 2.63 | 9 | 3 | 33 | 60 | 78.7 | 6.9 |
| 119 | Hal Newhouser | 24 | 1945 | DET | 186 | 1.81 | 25 | 9 | 2 | 212 | 313.3 | 6.1 |
| 120 | Armando Benitez | 24 | 1997 | BAL | 186 | 2.45 | 4 | 5 | 9 | 106 | 73.3 | 13.0 |
| 121 | Walter Johnson | 22 | 1910 | WS1 | 185 | 1.36 | 25 | 17 | 1 | 313 | 370 | 7.6 |
| 122 | Joey Jay | 22 | 1958 | ML1 | 185 | 2.14 | 7 | 5 | 0 | 74 | 96.7 | 6.9 |
| 123 | Jerry Bell | 24 | 1972 | ML4 | 185 | 1.66 | 5 | 1 | 0 | 20 | 70.7 | 2.5 |
| 124 | Monte Pearson | 24 | 1933 | CLE | 184 | 2.33 | 10 | 5 | 0 | 54 | 135.3 | 3.6 |
| 125 | Vicente Romo | 25 | 1968 | CLE | 184 | 1.62 | 5 | 3 | 12 | 54 | 83.3 | 5.8 |
| 126 | Billy Rhines | 21 | 1890 | CIN | 183 | 1.95 | 28 | 17 | 0 | 182 | 401.3 | 4.1 |
| 127 | Stu Miller | 24 | 1952 | SLN | 182 | 2.05 | 6 | 3 | 0 | 64 | 88 | 6.5 |
| 128 | Hal Newhouser | 25 | 1946 | DET | 181 | 1.94 | 26 | 9 | 1 | 275 | 292.7 | 8.5 |
| 129 | Jim Gardner | 21 | 1895 | PIT | 181 | 2.64 | 8 | 2 | 0 | 31 | 85.3 | 3.3 |
| 130 | Lindy McDaniel | 24 | 1960 | SLN | 180 | 2.09 | 12 | 4 | 26 | 105 | 116.3 | 8.1 |
| 131 | Larry Sherry | 23 | 1959 | LAN | 180 | 2.19 | 7 | 2 | 3 | 72 | 94.3 | 6.9 |
| 132 | Clem Labine | 24 | 1951 | BRO | 180 | 2.2 | 5 | 1 | 0 | 39 | 65.3 | 5.4 |
| 133 | Ernie Shore | 24 | 1915 | BOS | 179 | 1.64 | 19 | 8 | 0 | 102 | 247 | 3.7 |
| 134 | Mike Garcia | 25 | 1949 | CLE | 178 | 2.36 | 14 | 5 | 2 | 94 | 175.7 | 4.8 |
| 135 | Johnny Antonelli | 24 | 1954 | NY1 | 177 | 2.3 | 21 | 7 | 2 | 152 | 258.7 | 5.3 |
| 136 | Dick Radatz | 25 | 1962 | BOS | 177 | 2.24 | 9 | 6 | 24 | 144 | 124.7 | 10.4 |
| 137 | Harry Krause | 20 | 1909 | PHA | 177 | 1.39 | 18 | 8 | 0 | 139 | 213 | 5.9 |
| 138 | Walter Johnson | 23 | 1911 | WS1 | 176 | 1.9 | 25 | 13 | 1 | 207 | 322.3 | 5.8 |
| 139 | Mel Stottlemyre | 22 | 1964 | NYA | 176 | 2.06 | 9 | 3 | 0 | 49 | 96 | 4.6 |
| 140 | John Shaffer | 22 | 1886 | NY4 | 176 | 1.96 | 5 | 3 | 0 | 36 | 69 | 4.7 |
| 141 | Smoky Joe Wood | 22 | 1912 | BOS | 175 | 1.91 | 34 | 5 | 1 | 258 | 344 | 6.8 |
| 142 | Danny Frisella | 25 | 1971 | NYN | 175 | 1.99 | 8 | 5 | 12 | 93 | 90.7 | 9.2 |
| 143 | Henry Boyle | 23 | 1884 | SLU | 175 | 1.74 | 15 | 3 | 1 | 88 | 150 | 5.3 |
| 144 | Al Hrabosky | 23 | 1973 | SLN | 175 | 2.09 | 2 | 4 | 5 | 57 | 56 | 9.2 |
| 145 | Rube Waddell | 25 | 1902 | PHA | 174 | 2.05 | 24 | 7 | 0 | 210 | 276.3 | 6.8 |
| 146 | Jeff Tesreau | 24 | 1912 | NY1 | 173 | 1.96 | 17 | 7 | 1 | 119 | 243 | 4.4 |
| 147 | Gary Nolan | 24 | 1972 | CIN | 173 | 1.99 | 15 | 5 | 0 | 90 | 176 | 4.6 |
| 148 | Hub Pruett | 21 | 1922 | SLA | 173 | 2.33 | 7 | 7 | 7 | 70 | 119.7 | 5.3 |
| 149 | Pidgey Morgan | 22 | 1875 | SL1 | 173 | 1.29 | 1 | 3 | 0 | 7 | 42 | 1.5 |
| 150 | Dupee Shaw | 25 | 1884 | BSU | 172 | 1.77 | 21 | 15 | 0 | 309 | 315.7 | 8.8 |
| 151 | Mel Harder | 24 | 1934 | CLE | 172 | 2.61 | 20 | 12 | 4 | 91 | 255.3 | 3.2 |
| 152 | Jack Aker | 25 | 1966 | KC1 | 172 | 1.99 | 8 | 4 | 32 | 68 | 113 | 5.4 |
| 153 | Bill Stafford | 21 | 1960 | NYA | 172 | 2.25 | 3 | 1 | 0 | 36 | 60 | 5.4 |
| 154 | Jack Stivetts | 21 | 1889 | SL4 | 171 | 2.25 | 12 | 7 | 2 | 143 | 191.7 | 6.7 |
| 155 | Cy Young | 25 | 1892 | CL4 | 170 | 1.93 | 36 | 12 | 0 | 168 | 453 | 3.3 |
| 156 | Mark Littell | 23 | 1976 | KCA | 169 | 2.08 | 8 | 4 | 16 | 92 | 104 | 8.0 |
| 157 | Watson Clark | 25 | 1927 | BRO | 169 | 2.32 | 7 | 2 | 2 | 32 | 73.7 | 3.9 |
| 158 | Tim McNamara | 23 | 1922 | BSN | 169 | 2.42 | 3 | 4 | 0 | 16 | 70.7 | 2.0 |
| 159 | Bob Feller | 21 | 1940 | CLE | 168 | 2.61 | 27 | 11 | 4 | 261 | 320.3 | 7.3 |
| 160 | Rawly Eastwick | 25 | 1976 | CIN | 168 | 2.09 | 11 | 5 | 26 | 70 | 107.7 | 5.9 |
| 161 | Ray Narleski | 25 | 1954 | CLE | 167 | 2.22 | 3 | 3 | 13 | 52 | 89 | 5.3 |
| 162 | Taylor Phillips | 23 | 1956 | ML1 | 167 | 2.26 | 5 | 3 | 2 | 36 | 87.7 | 3.7 |
| 163 | Lon Warneke | 24 | 1933 | CHN | 166 | 2.0 | 18 | 13 | 1 | 133 | 287.3 | 4.2 |
| 164 | Herb Score | 23 | 1956 | CLE | 165 | 2.53 | 20 | 9 | 0 | 263 | 249.3 | 9.5 |
| 165 | Ewell Blackwell | 24 | 1947 | CIN | 164 | 2.47 | 22 | 8 | 0 | 193 | 273 | 6.4 |
| 166 | Lefty Gomez | 22 | 1931 | NYA | 164 | 2.67 | 21 | 9 | 3 | 150 | 243 | 5.6 |
| 167 | Lon Warneke | 23 | 1932 | CHN | 164 | 2.37 | 22 | 6 | 0 | 106 | 277 | 3.4 |
| 168 | Howie Pollet | 25 | 1946 | SLN | 163 | 2.1 | 21 | 10 | 5 | 107 | 266 | 3.6 |
| 169 | Bob Feller | 20 | 1939 | CLE | 162 | 2.85 | 24 | 9 | 1 | 246 | 296.7 | 7.5 |
| 170 | Freddie Fitzsimmons | 23 | 1925 | NY1 | 161 | 2.65 | 6 | 3 | 0 | 17 | 74.7 | 2.0 |
| 171 | Hal Schumacher | 22 | 1933 | NY1 | 155 | 2.16 | 19 | 12 | 1 | 96 | 258.7 | 3.3 |
| 172 | Joe Krakauskas | 23 | 1938 | WS1 | 154 | 3.12 | 7 | 5 | 0 | 104 | 121.3 | 7.7 |
| 173 | Gene Thompson | 22 | 1939 | CIN | 154 | 2.54 | 13 | 5 | 2 | 87 | 152.3 | 5.1 |
Seasons with IP >= the league's scheduled games that year (1 inning per scheduled team game) for starters, or at least one-third of that bar for relievers. Season age = age as of June 30 of the season year (the Baseball-Reference convention); a July-or-later birthday means one less. Era adjustment is league-season normalization only, not park-adjusted. Unrecorded early-era stats (HBP, SF, RBI) display an em dash exactly as the source records them.
A season's age is the player's age as of June 30 of the season year, the Baseball-Reference convention. Players with no recorded birth year are excluded rather than guessed. The board shows the union of the all-time top 60 seasons and the top 20 of each era, so every era filter has rows.
Batting boards cover every batting line regardless of position, so two-way seasons (Babe Ruth 1919, Shohei Ohtani 2021) count their batting lines. Pitching boards qualify a season on the starter bar (an inning per scheduled team game) or the reliever bar (a third of that).
The records come from the SABR / Sean Lahman baseball database (2025 edition), used under Creative Commons Attribution-ShareAlike 3.0. See the sources page for every dataset behind Legends Deck.