Revealing mistake: In the scene where Romeo and Roy snap all the clubs other than the 7-iron, Roy drops his golf ball onto the grass. However, when he hits the ball, a white tee can be seen travelling up towards the top left of the screen. The tee can easily be seen but is much clearer in slow motion.
Continuity mistake: When Roy is talking to Romeo about winning the U.S. Open he is seen with a glass of milk in his hand in one scene and in the next the glass in on the table in front of him.
Romeo Posar: Now THAT was a defining moment. And the definition was "shit."
Trivia: Kevin Costner made most of his own golf shots in this film.