List of Major League Baseball progressive single-season home run leaders


The Major League Baseball single-season record for the number of home runs hit by a batter has changed many times over the years.

Progression

Summarized from The Baseball Encyclopedia for older information, and from various news stories for newer information:

Home runs per game

Number of home runs in the season divided by number of games in schedule
AverageName
0.451Barry Bonds
0.430Mark McGwire
0.390Babe Ruth
0.383Babe Ruth
0.377Roger Maris
0.350Babe Ruth
0.240Ned Williamson
0.200Babe Ruth
0.140Harry Stovey
0.100Charley Jones
0.070George Hall