John Garrett Olerud, Jr., nicknamed "Johnny O", is an American former professional baseball player. He played in Major League Baseball as a first baseman from 1989 through 2005, most notably as a member of the Toronto Blue Jays team that won two consecutive World Series championships in 1992 and 1993. He also played for the New York Mets, Seattle Mariners, New York Yankees, and Boston Red Sox.

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.