Harry Leroy "Roy" Halladay III was an American professional baseball pitcher, who played in Major League Baseball (MLB) for the Toronto Blue Jays and Philadelphia Phillies between 1998 and 2013. His nickname, "Doc", was coined by Toronto Blue Jays announcer Tom Cheek, and was a reference to Wild West gunslinger Doc Holliday. An eight-time All-Star, Halladay was one of the most dominant pitchers of his era and is regarded as one of the greatest pitchers of all time. Known for his outstanding durability, he led the league in complete games seven times, the most of any pitcher whose career began after 1945. He also led the league in strikeout-to-walk ratio five times and innings pitched four times.

The Toronto Blue Jays are a Canadian professional baseball team based in Toronto. The Blue Jays compete in Major League Baseball (MLB) as a member club of the American League (AL) East Division. Since 1989, the team has played its home games primarily at Rogers Centre in downtown Toronto.