Only four switch-hitters have been able to hit 40 or more home runs in one season. They are:
American League
Mickey Mantle 54 – 1961
Mickey Mantle 52 – 1956
Mickey Mantle 42 – 1958
Mickey Mantle 40 – 1960
National League
Chipper Jones 45 – 1999
Todd Hundley 41 – 1996
Ken Caminiti 40 – 1997