On August 8, 2004 — At Yankee Stadium, less than an hour after the Blue Jays lose to New York for their fifth consecutive defeat, Toronto fires their manager, Carlos Tosca. First base coach John Gibbons will be the interim skipper for the remainder of the season.

Source:
Baseball Reference August 8
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game