| ERA LEADERS | |||||||
| Year | Leag | Div | Teams | Player | ERA | ||
| 1908 | AL | CHI | Ed Walsh | 1.24 | |||
| 1908 | NL | NYG | Christy Mattewson | 1.31 | |||
| 1954 | AL | CLE | Bob Lemon | 2.56 | |||
| 1954 | NL | NYG | Ruben Gomez | 2.50 | |||
| 1958 | AL | NYY | Whitey Ford | 1.61 | |||
| 1958 | NL | STL | Sam Jones | 2.35 | |||
| 1960 | AL | DET | Jim Bunning | 2.47 | |||
| 1960 | NL | SFG | Sam Jones | 2.51 | |||
| 1961 | AL | NYY | Bill Stafford | 2.58 | |||
| 1961 | NL | STL | Ray Sadecki | 2.36 | |||
| 1962 | AL | DET | Hank Aquirre | 2.23 | |||
| 1962 | NL | MIL | Bob Shaw | 2.46 | |||
| 1963 | AL | LAA | Ken McBride | 1.72 | |||
| 1963 | NL | LAD | Sandy Koufax | 2.04 | |||
| 1964 | AL | CHI | Joe Horlen | 1.42 | |||
| 1964 | NL | LAD | Sandy Koufax | 2.01 | |||
| 1965 | AL | CLE | Sam McDowell | 2.06 | |||
| 1965 | NL | LAD | Sandy Koufax | 1.83 | |||
| 1966 | AL | CHI | Gary Peters | 2.31 | |||
| 1966 | NL | STL | Bob Gibson | 1.89 | |||
| 1967 | AL | NYY | Al Downing | 1.51 | |||
| 1967 | NL | LAD | Bill Singer | 1.99 | |||
| 1968 | AL | CLE | Luis Tiant | 1.38 | |||
| 1968 | NL | STL | Bob Gibson | 1.14 | |||
| 1969 | AL | BAL | Jim Palmer | 2.24 | |||
| 1969 | NL | ATL | Phil Niekro | 1.86 | |||
| 1970 | AL | MIN | Bert Blyleven | 2.42 | |||
| 1970 | NL | PIT | Luke Walker | 2.09 | |||
| 1971 | AL | KCR | Paul Splittorff | 1.81 | |||
| 1971 | NL | SDP | Dave Roberts | 1.65 | |||
| 1982 | AL | DET | Geoff Petry | 2.24 | |||
| 1982 | NL | MON | Charlie Lea | 1.83 | |||
| 1983 | AL | DET | Jack Morris | 2.35 | |||
| 1983 | NL | CIN | J.Price | 2.27 | |||
| 1984 | AL | CAL | Geoff Zahn | 2.70 | |||
| 1984 | NL | PIT | Jose DeLeon | 2.05 | |||
| 2007 | AL | TOR | A.J. Burnett | 2.69 | |||
| 2007 | NL | SDP | Jake Peavy | 2.44 | |||
| 2008 | AL | OAK | Justin Duchschere | 2.29 | |||
| 2008 | NL | ARI | Brandon Webb | 2.57 | |||