Page "Hank Aaron" Paragraph 24

During his days in Atlanta, Aaron reached a number of milestones ; he was only the eighth player ever to hit 500 career home runs, with his 500th coming against Mike McCormick of the San Francisco Giants on July 14, 1968 — exactly one year after former teammate Eddie Mathews had hit his 500th.

He was, at the time, the second-youngest player to attain that plateau.