Baseball History on June 7 from Baseball Almanac

Baseball history on June 7, including every baseball player who was born on June 7, died on June 7, made their debut on June 7, and ended their big league career on June 7, by Baseball Almanac. — www.baseball-almanac.com

The Baseball Almanac website carries a plethora of June 7 events like:
1932 - Pitcher John Quinn, at 47, becomes the oldest player to have an extra-base hit (a double) and bat in a run as the Dodgers beat the Cubs 9-2.
1946 - One hour before game time, Pirates players vote 20-16 in favor of a walkout rather than play against the Giants.
1969 - The Washington Senators name Jeff Burroughs the number one pick in the June free-agent draft.