When did Deion Sanders hit inside the park Homer in Yankee stadium?

July 17th, 1990. Bo Jackson had 3 homers in the game and I believe Deion's ITP homerun knocked Bo out of the game. He dove and missed it allowing Deion to get the extra bases:

http://www.Baseball-reference.com/players/event_hr.cgi?id=sandede02&t=b