Question: who hold the mlb single season homerun record
Answer: 73 , by Barry Bonds , San Francisco Giants ( NL ) , 2001 ( 162 game schedule ) In part due to 9 / 11 terrorist attacks , the then - recently set record of only three years by McGwire , and Bonds ' poor relationship with the media and some fans , Bonds ' record setting was not as publicized as the previous chases .