Visible crew/equipment: When Roy is first practising at the U.S. Open you can see cue cards in Romeo's sunglasses a few times.
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.
Roy 'Tin Cup' McAvoy: This is for Venturi who thinks I should lay up.
Romeo: What does he know? He only won this tournament before you were born.
Trivia: Kevin Costner made most of his own golf shots in this film.