MLB Single Season Home Run Leaders


All Time MLB Records
Single Season MLB Records
Career BA Leaders Highest BA in a Season
Career Hits Leaders Most Hits in a Season
Career HR Leaders Most HRs in a Season
Career RBI Leaders Most RBIs in a Season
Career Runs Leaders Most Runs in a Season
Career SB Leaders Most SBs in a Season
Career Wins Leaders Most Saves in a Season
Career Saves Leaders Most Strikeout in a Season
Career Strikeout Leaders Lowest ERA in a Season
Career ERA Leaders  

MLB Milestones
No Hitters and Perfect Games 500 Home Run Club
300 Wins Club 3000 Hits Club
3000 Strikeouts Club Triple Crown Winners


Most Home Runs in a Single MLB Season
Rank Player Team
HRs
Year
1Barry Bonds San Francisco Giants
73
2001
2Mark McGwire  St. Louis Cardinals
70
1998
3Sammy Sosa  Chicago Cubs
66
1998
4Mark McGwire  St. Louis Cardinals
65
1999
5Sammy Sosa Chicago Cubs
64
2001
6Sammy Sosa Chicago Cubs
63
1999
7Roger Maris New York Yankees
61
1961
8Babe Ruth New York Yankees
60
1927
9Babe RuthNew York Yankees
59
1921
T10Jimmie Foxx Philadelphia Athletics
58
1932
T10Hank Greenberg Detroit Tigers
58
1938
T10Ryan Howard Philadelphia Phillies  
58
2006
T10Mark McGwire  Oakland Athletics
St. Louis Cardinals
58
1997
T14Luis Gonzalez Arizona Diamondbacks  
57
2001
T14Alex Rodriguez  Texas Rangers
57
2002
T16Ken Griffey Seattle Mariners
56
1997
T16Ken GriffeySeattle Mariners 
56
1998
T16Hack Wilson Chicago Cubs
56
1930
T19Ralph Kiner Pittsburgh Pirates
54
1949
T19Mickey Mantle New York Yankees
54
1961
T19David Ortiz Boston Red Sox
54
2006
T19Alex Rodriguez  New York Yankees
54
2007
T19Babe RuthNew York Yankees
54
1920
T19Babe RuthNew York Yankees
54
1928
T25George Foster  Cincinnati Reds
52
1977
T25Mickey MantleNew York Yankees
52
1956
T25Willie Mays San Francisco Giants
52
1965
T25Mark McGwire  Oakland Athletics
52
1996
T25Alex Rodriguez  Texas Rangers
52
2001
T25Jim Thome Cleveland Indians
52
2002
T31Cecil Fielder  Detroit Tigers
51
1990
T31Andruw Jones  Atlanta Braves
51
2005
T31Ralph Kiner Pittsburgh Pirates
51
1947
T31Willie Mays New York Giants
51
1955
T31Johnny Mize New York Giants
51
1947
T36Brady Anderson Baltimore Orioles
50
1996
T36Albert Belle  Baltimore Orioles
50
1995
T36Prince Fielder Milwaukee Brewers
50
2007
T36Jimmie Foxx Boston Red Sox
50
1938
T36Sammy Sosa  Chicago Cubs
50
2000
T36Greg Vaughn  San Diego Padres
50
1998

Sources:
baseball-reference.com
baseball-almanac.com
wikipedia.org
thebaseballcube.com