Continuity mistake: When Ben Stiller goes to the girl's house in the white suit - she slams his head into the wall and a blood/makeup stain shows up...when the camera angle changes the stain is gone.
Continuity mistake: During the final game when Justin is by himself, you can see Owen sitting on the bench without his track suit. When he throws the ball at White you can quickly see in the background Owen is standing behind Justin with his track suit on. Few shots later it cuts back to the bench and he is sitting down with the rest of the team with the uniform minus the track suit.
Continuity mistake: When the guys are all sitting around (after the car wash) they are throwing ideas to save the gym. In one shot Gordon pulls his magazine out of his bag, but a split second later in a closer shot he pulls the magazine out again.
Continuity mistake: When Peter first leaves his house near the beginning of the movie, he throws his empty bottle at a lawn chair, and it bounces off onto the ground. In the next shot, when he drives away, you can see nothing on the ground and what looks like the bottle now lying on the chair.
Continuity mistake: When Martha Johnstone falls on Justin during the cheerleading tryouts, her skirt falls up and is laying on her back; they show this in a front view; but when they switch to a side view, her skirt is back down covering her bottom.
Continuity mistake: When Average Joe's team are running to the balls against Skillz That Kill, you see the Lumberjack's feet instead.
Continuity mistake: In the scene when Gordon gets angry seeing his "mail order wife" with another man you can see the dancers in the background, behind Gordon, just standing around. When the camera pans out they are all dancing and celebrating. When it cuts back to Gordon they are just standing and leaning against the pole.
Continuity mistake: When White pushes the waitress into the table at the Dirty Sanchez, she takes the tray with her as she stands up and walks away. In the next shot, Gordon moves the tray off the table.
Continuity mistake: In the first scene that Vince Vaughn goes to global gym to confront Goodman, Vince and Ben are talking to each other. During the conversation, you can see a woman working out on a fitness machine behind Vince. When the shot widens as they are leaving, neither the machine nor the woman is there.
Continuity mistake: When Peter La Fleur is presented with a contract to sign his gym over and Me'Shell opens the briefcase to "Show" the $100,000.00 the money appears in the middle of the briefcase, however, when the camera angle is changed so you see the back of White's head you cannot see a trace of the money in the briefcase.
Continuity mistake: When Peter is talking to White about the deal, Me'Shell is standing in back of Peter. In the first two shots his hands are on his hips, in the third shot his left hand is over his right wrist on his stomach, and the next shot his hands are on his hips again.
Continuity mistake: When White and Peter are going back and forth at each other in the Dirty Sanchez, White's "G" charm around his neck keeps going from forwards to backwards from shot to shot.
Continuity mistake: When Gordon is talking to Peter about the OSQ magazine about midget tossing, right before Gordon hands him the magazine, Peter has an orange juice carton in his hand. In the next shot you see him holding the magazine with both hands empty, with not enough time to get rid of the orange juice.
Factual error: At the start of the movie when White Goodman is advertising Globo Gym in his commercial, they show a picture of White dated 1987. He states that this was him 6 years and 600 lbs ago. Later in the movie, the ESPN Ocho broadcast states they have been covering sports since 1999. If the 1987 picture was 6 years ago, that makes the current date 1993, so 1999 would be 6 years in the future.
Continuity mistake: When Peter walks into Average Joe's in the beginning you see Owen leaning over the counter reading. His hair is parted to the right and has spots where you can see his forehead (it's grouped). But in each shot where it focuses back to Owen his hair is different each time, sometimes combed nicely with no empty spots.
Continuity mistake: When the waitress gets pushed into the table at the Dirty Sanchez, the food splatters everywhere, but none of it gets on Owen; he is completely clean. Then, they have a shot of him directly afterward, and he is completely covered in food.
Continuity mistake: When Owen wins the match for Average Joe's, the team puts him on their shoulders, and after Owen is put down he locks hands with Patches, but in the next shot, Kate is locked hands with Patches.
Audio problem: In the scene after the referee has shouted that it's Sudden Death, the commentators are talking. The only sound you can hear is them talking. But if you look behind them, there are loads of people who are shouting.
Continuity mistake: In the final showdown after Peter knocks White down, his team rushes on to congratulate him. At first the court is clear behind Peter, but when the team rushes on there are a lot of balls behind him. In the same scene, there is a large, black box with skulls and crossed bones on it that isn't seen in the wide shot.
Continuity mistake: When Peter and White are in sudden death, White gets hit with the ball and slides backwards. In the first shot he is parallel with the words and the next shot he is perpendicular.
Factual error: During Globo Gym's commercial at the start of the movie, White shows a picture of himself as an obese man in 1987 and indicates that was him 6 years prior. However in the same commercial you can see him grab a Vitamin Water off the shelf. Vitamin Water did not exist in 1993. In fact, its parent company Glaceau was not founded until 1996.