Factual error: On the final hole, the shot that Roy "has" to make is hit perfectly the first time. For some unknown reason, it spins backward off the green. This is patently impossible with a 3-wood. The club just doesn't allow it, and any golfer on the face of the earth knows it. This scene should have been shot with a long iron, a 2 or 3 iron, which is still very hard to hit, but at least possible (for a pro) to put enough spin to back it up.
Factual error: After Roy's first round in the US Open, there is a NASCAR race on TV. The race is the Brickyard 400, which is run in August, showed during the US Open, which is played in June.