Pitching scenes were horizontally reversed to transform right-hander Josh Duhamel into the left-hander Bill "Spaceman" Lee.

The real Bill Lee cameos as a beer league player.

Canadian border guards at Canada/US border crossings are part of the Canadian Border Services government organization and hence would never wear red RCMP uniforms.

The French spoken by many in the movie is from France and not from Quebec. Accents and expressions are different between the two.