Date: 5/14/1967
By the time Mickey Mantle hit his 500th home run, he was a shell of his former self. Hobbled by injuries and forced to play third, he clubbed it in the 7th inning of a mid-May game against the Orioles, with just 18,872 fans in attendance. Still, it was an undoubtedly huge accomplishment—he was just the third hitter at the time to reach the 500 homer mark—and further cemented the Mick's spot as one of the greatest Yankees of all time.