Most Homers In a Season By a Hall of Famer:
60, by Babe Ruth (1927)
59, by Babe Ruth (1921)
58, by Hank Greenberg (1938) and Jimmie Foxx (1932)
56, by Hack Wilson (1930)
54, by Mickey Mantle (1961), Ralph Kiner (1949) and Babe Ruth (1920 and 1928)
52, by Willie Mays (1965) and Mickey Mantle (1956)
Those top two Ruth seasons are eighth and ninth on the full most-homers-in-a-season list. Bonds, Maris, two McGwire seasons and three Sosa seasons are ahead of the Babe.
Most Homers In a Season By A Hall of Famer, Since Division Play Began 45 Seasons Ago:
49, by Harmon Killebrew (1969) and Andre Dawson (1987)
48, by Mike Schmidt (1980) and Willie Stargell (1971)
47, by Hank Aaron (1971) and Reggie Jackson (1969)
46, by Jim Rice (1978) 46
45, by Johnny Bench (1970), Willie McCovey (1969) and Mike Schmidt (1979) 45
Those last three seasons listed, the 45-homer seasons by Bench, McCovey and Schmidt — when you go to find them in the full list of most-homers-in-a-season all-time, you’ll find them among the twenty seasons that are tied for 117th place.