In the days before performance-enhancing substances, the great Hank Aaron hit a career-record 755 home runs, a mark he held for 33 years. Hammerin’ Hank began his baseball career in the Negro Leagues when black players were still banned from Major League Baseball. Hank played for 23 years in Milwaukee and Atlanta and made the All-Star team in both the National and American Leagues for 20 straight years.