Continuity mistake: During Molly's first golf lesson, Roy recites his poem of 'What is a golf swing?' During this scene, when the camera faces Molly from behind Roy, she leans to one side. However, when the camera faces Roy from behind Molly, she is standing straight.
Continuity mistake: After Kevin Costner plays the first round of the US Open when he plays horribly, he and his caddie are seen looking at his score being posted on the scoreboard. The number posted for the 18th hole is a 5. Later on, however, when he is talking to Don Johnson in the bar, and Johnson asks him, "How the hell did you shoot an 83?" he replies, "I missed a 5-foot putt on the last hole for an 82." Considering that the announcers say several times that he hit his second shot on number 18 in the water every single day of the tournament, this is impossible. If he hits it in the water, he takes a penalty shot and now he is hitting his fourth shot onto the green, putting for a 5. If he then, as he says, misses the 5 foot putt, he must make a 6 on the hole. I've watched it a thousand times, it just isn't possible.
Continuity mistake: At the start of the film, Molly arrives and spoils Roy's riddle. She picks up a golf club that was hanging from some chains. She is then holding it in her hands. When she turns round, the golf club is hanging up again.
Continuity mistake: After Dave takes his first shot on the final hole, he is seen walking and you can see that his glove is tucked in his back pocket. The camera angle changes to a front view and you see him taking off his glove and tucking it in his back pocket again.
Other mistake: When Roy makes the bet with Gary McCord on his second shot of the bathroom wall, the bet was he would get the bounce shot onto the green. The ball never gets on the green. The ball is actually on the fringe and a good 5 feet away from the green. Yet Gary still pays the bet that he lost. In reality he won the bet.
Continuity mistake: When Roy starts to play against Boone, he is taking a pink ball from Romeo, while we see Boone in the background wearing his sunglasses. The camera then changes to a close-up on Boone making a derogatory comment on the "pink fag ball" ball, and the sunglasses are now not on.
Continuity mistake: Just as Molly starts her first golf lesson, you can see her car in the distance. At the end of the lesson, when she walks back to the car, the car has changed position and angle.
Continuity mistake: During the scene where Roy is caddying for Dave Simms, Phil Mickelson hits a shot to the green. Roy says, "He's on the green - in good shape too". However, when Roy's ball lands on the green, Phil's ball is nowhere to be seen.
Plot hole: In the scene where Roy takes his ball out of the hole, at the last round of the US Open, the crowd are going wild etc. Dave, who has a chance to win the competition, doesn't finish off his round.
Continuity mistake: At the beginning of the movie, Roy has just finished practising and is standing next to his golf bag holding a bottle of beer. He is not wearing a golf glove. However, as he is walking back to the 'clubhouse' he is seen removing a golf glove, with his mouth, from his left hand.
Continuity mistake: During the first competition when Roy is caddying for David Sims we see Roy offer David the 3 Wood. When David refuses they have a discussion. Watch as you see Roy holding the club in his left hand lower the club down holding it in his hand. Right after the discussion we see Roy then once again pull the 3 Wood from the bag and again offer it to David.
Continuity mistake: As Roy is destroying his clubs during their qualifying rounds, Romeo's stance with the golf bag is different each time the camera pans back to him throughout the scene.
Continuity mistake: Right after the spotter points out to Roy where his ball is in the woods, not only does the spotter disappear, but Roy is seen moving a large leaf that was not even near the ball in the first shot of the scene.
Continuity mistake: When Roy is lying on the sofa whilst talking on the phone to his ex-girlfriend, the telephone disappears. At the end of the call he puts the telephone on his chest, but the telephone is not there in the next shot.
Continuity mistake: After the doctor catches Roy wearing all the golf equipment, they are outside talking and his hair keeps changing from being tucked under his hat to sticking out from under the hat.
Continuity mistake: At the start of Molly's first golf lesson, you can see her car in the distance. However, when she returns to the car, it has changed position and angle.
Continuity mistake: When Roy starts to play against Boone, he is taking a pink ball from Romeo, while we see Boone in the background wearing his sunglasses. The camera then changes to a close-up on Boone making a derogatory comment on the "pink fag ball" ball, and the sunglasses are now not on.
Continuity mistake: When Earl is Roy's caddy, he stops at the first hole, leans over the golf bag exhausted saying that he wished Romeo was there. The camera angle changes and he is now standing straight up and not breathing hard.
Continuity mistake: Nearing the end of the movie, Craig Stadler approaches Molly and asks for a card or two. He has his sunglasses on his head, if you look at his hair, in the first shot its swept down to the side. In the next shot a portion is hanging between the glasses against his forehead. In the following shot as he walks away, his hair is back to sweeping to the side.