Most Home Runs in a Season
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Rank
Player
Home Runs
Years
Bats
1
Barry Bonds
73
2001
L
2
Mark McGwire
70
1998
R
3
Sammy Sosa
66
1998
R
4
Mark McGwire
65
1999
R
5
Sammy Sosa
64
2001
R
6
Sammy Sosa
63
1999
R
7
Roger Maris
61
1961
L
8
Babe Ruth
60
1927
L
9
Babe Ruth
59
1921
L
10
Hank Greenberg
58
1938
R
11
Jimmie Foxx
58
1932
R
12
Alex Rodriguez
57
2002
R
13
Luis Gonzalez
57
2001
L
14
Ken Griffey Jr.
56
1998
L
15
Ken Griffey Jr.
56
1997
L
16
Hack Wilson
56
1930
R
17
Mickey Mantle
54
1961
B
18
Ralph Kiner
54
1949
R
19
Babe Ruth
54
1928
L
20
Babe Ruth
54
1920
L
21
Jim Thome
52
2002
L
22
Alex Rodriguez
52
2001
R
23
Mark McGwire
52
1996
R
24
George Foster
52
1977
R
25
Willie Mays
52
1965
R
26
Mickey Mantle
52
1956
B
27
Cecil Fielder
51
1990
R
28
Willie Mays
51
1955
R
29
Johnny Mize
51
1947
L
30
Ralph Kiner
51
1947
R
31
Sammy Sosa
50
2000
R
32
Greg Vaughn
50
1998
R
33
Brady Anderson
50
1996
L
34
Albert Belle
50
1995
R
35
Jimmie Foxx
50
1938
R
36
Sammy Sosa
49
2002
R
37
Todd Helton
49
2001
L
38
Shawn Green
49
2001
L
39
Jim Thome
49
2001
L
40
Barry Bonds
49
2000
L
41
Albert Belle
49
1998
R
42
Larry Walker
49
1997
L
43
Ken Griffey Jr.
49
1996
L
44
Andre Dawson
49
1987
R
45
Mark McGwire
49
1987
R
46
Harmon Killebrew
49
1969
R
47
Frank Robinson
49
1966
R
48
Harmon Killebrew
49
1964
R
49
Willie Mays
49
1962
R
50
Ted Kluszewski
49
1954
L
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