ERA+ operates under the same principle as
OPS+. An ERA+ above 100 is above league average. Conversely, an ERA+ below 100 is below league average. ERA+ also adjusts to the player's ballpark(s).
Starters:
Minimum 175 innings pitched
1. Sandy Koufax (Los Angeles Dodgers, 1966) - 190 (1.73 ERA)
2. Sandy Koufax (Los Angeles Dodgers, 1964) - 187 (1.74 ERA)
3. Joe Horlen (Chicago White Sox, 1964) - 183 (1.88 ERA)
4. Sandy Koufax (Los Angeles Dodgers, 1965) - 160 (2.04 ERA)
5. Sandy Koufax (Los Angeles Dodgers, 1963) - 159 (1.88 ERA)
6. Dave Roberts (San Diego Padres, 1971) - 157 (2.10 ERA)
7. Saul Rogovin (Detroit Tigers/Chicago White Sox, 1951) - 146 (2.78 ERA)
7. Joe Horlen (Chicago White Sox, 1967) - 146 (2.06 ERA)
8. Sandy Koufax (Los Angeles Dodgers, 1962) - 141 (2.54 ERA)
9. Joe Horlen (Chicago White Sox, 1968) - 134 (2.37 ERA)
10. Ken Holtzman (Chicago Cubs, 1970) - 132 (3.38 ERA)
11. Joe Horlen (Chicago White Sox, 1966) - 130 (2.43 ERA)
12. Dave Roberts (Houston Astros, 1973) - 127 (2.85 ERA)
13. Sandy Koufax (Los Angeles Dodgers, 1961) - 123 (3.52 ERA)
13. Steve Stone (Baltimore Orioles, 1980) - 123 (3.23 ERA)
14. Ross Baumgarten (Chicago White Sox, 1979) - 121 (3.54 ERA)
15. Ken Holtzman (Oakland Athletics, 1973) - 120 (2.97 ERA)
16. Ken Holtzman (Oakland Athletics, 1975) - 116 (3.14 ERA)
17. Jason Marquis (St. Louis Cardinals, 2004) - 115 (3.71 ERA)
18. Ken Holtzman (Oakland Athletics, 1972) - 114 (2.51 ERA)
18. Scott Feldman (Texas Rangers, 2009) - 114 (4.08 ERA)
19. Ken Holtzman (Chicago Cubs, 1969) - 113 (3.58 ERA)
19. Jason Marquis (Colorado Rockies, 2009) - 113 (4.04 ERA)
20. Joe Horlen (Chicago White Sox, 1965) - 111 (2.88 ERA)
21. Ken Holtzman (Oakland Athletics, 1974) - 109 (3.07 ERA)
22. Steve Stone (Baltimore Orioles, 1979) - 106 (3.77 ERA)
23. Dave Roberts (San Diego Padres, 1970) - 104 (3.81 ERA)
24. Joe Horlen (Chicago White Sox, 1969) - 103 (3.78 ERA)
24. Dave Roberts (Houston Astros, 1974) - 103 (3.40 ERA)
25. Jason Marquis (St. Louis Cardinals, 2005) - 102 (4.13 ERA)
Relievers/Swingmen/Shortened Season:
Minimum 30 innings pitched
1. Barry Latman (Chicago White Sox, 1958) - 484 (0.76 ERA)
2. Craig Breslow (Cleveland Indians/Minnesota Twins, 2008) - 219 (1.91 ERA)
3. Scott Radinsky (Chicago White Sox, 1991) - 197 (2.02 ERA)
4. Larry Sherry (Los Angeles Dodgers, 1959) - 192 (2.19 ERA)
5. Al Levine (Anaheim Angels, 2001) - 190 (2.38 ERA)
6. Al Levine (Tampa Bay Devil Rays/Kansas City Royals, 2003) - 163 (2.79)
7. Scott Radinsky (Los Angeles Dodgers, 1996) - 161 (2.41 ERA)
8. Scott Radinsky (Los Angeles Dodgers, 1998) - 153 (2.63 ERA)
9. John Grabow (Pittsburgh Pirates, 2008) - 148 (2.84 ERA)
10. Al Levine (Anaheim Angels, 1999) - 144 (3.39 ERA)
11. Syd Cohen (Washington Senators, 1937) - 143 (3.11 ERA)
11. Scott Radinsky (Chicago White Sox, 1992) - 143 (2.73 ERA)
12. Harry Eisenstat (Cleveland Indians, 1942) - 140 (2.45 ERA)
12. Ken Holtzman (Chicago Cubs, 1967) - 140 (2.53 ERA)
13. Harry Eisenstat (Detroit Tigers, 1938) - 135 (3.73 ERA)
13. Sandy Koufax (Brooklyn Dodgers, 1955) - 135 (3.02 ERA)
14. Harry Eisenstat (Cleveland Indians, 1940) - 134 (3.14 ERA)
14. Scott Radinsky (Los Angeles Dodgers, 1997) - 134 (2.89 ERA)
14. Scott Schoeneweis (Toronto Blue Jays, 2005) - 134 (3.32 ERA)
15. Lloyd Allen (California Angels, 1971) - 130 (2.49 ERA)
15. Craig Breslow (Minnesota Twins/Oakland A's, 2009) - 130 (3.36 ERA)
16. Dave Roberts (San Francisco Giants/Pittsburgh Pirates, 1979) - 128 (2.90 ERA)
16. Jason Marquis (Atlanta Braves, 2001) - 128 (3.48 ERA)
17. Sam Nahem (St. Louis Cardinals, 1941) - 127 (2.98 ERA)
18. Scott Schoeneweis (New York Mets, 2008) - 126 (3.34 ERA)
18. John Grabow (Pittsburgh Pirates/Chicago Cubs, 2009) - 126 (3.36 ERA)
19. Barry Latman (Houston Astros, 1966) - 125 (2.71 ERA)
20. Dan Warthen (Montreal Expos, 1975) - 124 (3.11 ERA)
21. Marv Rotblatt (Chicago White Sox, 1951) - 119 (3.40 ERA)
21. Barry Latman (California Angels, 1965) - 119 (2.84 ERA)
22. Steve Stone (San Francisco Giants, 1972) - 118 (2.98 ERA)
22. Scott Feldman (Texas Rangers, 2006) - 118 (3.92 ERA)
23. Ross Baumgarten (Chicago White Sox, 1980) - 117 (3.44 ERA)
24. Larry Sherry (Detroit Tigers, 1965) - 113 (3.10 ERA)
25. Larry Sherry (Los Angeles Dodgers, 1962) - 112 (3.20 ERA)