on this day in 1967 Keeping a promise to his wife Merlyn, Mickey Mantle hit his 500th career home run on Mother’s Day, a shot into the lower deck into the right field corner of the lower deck at Yankee Stadium. The ‘Commerce Comet’ , now the sixth big leaguer to reach the milestone, hits the historic homer off Stu Miller helping New York defeat the Orioles, 6-5.
From National Past Time and YouTube

1988 Willie Stargell, who played his entire 21-year career with the Pirates, is the only person elected to the Baseball Hall of Fame this year. Blank ballots, sent and signed by nine writers wanting to emphasize the need for very exclusive selections, denies Jim Bunning entrance to Cooperstown as he receives less than the 75 percent needed for induction due to the votes which are counted, but do not name any players. ( From Nationalpastime.com)