Continuity mistake: After Burt Reynolds hits the guard in the crotch with the football, a wide shot shows 2:29 left in the game. He hits him again on the next play, and the scoreboard shows 2:35 left. The clock in a football game, of course, counts down, not up.
Continuity mistake: When the soccer coach is talking to the team in the class room she pulls down the world map on the screen. The camera flips back to the team for about 2 seconds and when the camera turns back to the coach the screen is pulled up.
Continuity mistake: During the tryout/league formation sequence at Harvey (Wrigley) Field, every shot takes place at the famous stadium, except one. When Betty Spaghetti backpedals to catch a fly ball, the background shows a rickety wooden outfield fence, not Wrigley's famous ivy-covered walls. (00:25:20)
Continuity mistake: At the detective agency, while Bud and Lou are talking to the murderer, the description of the murderer comes over the police radio, and it states "5 feet 11 inches, weighs 165, blue eyes, brown hair, last seen wearing a felt hat and dark borwn overcoat". Then 15 seconds later Bud says out loud, writing on a piece of paper the description "5 feet 10 inches, weight 165, blue eyes, sandy hair".
Continuity mistake: When the Kung Fu team is training, the coach throws an egg onto "Steel Leg's" foot. It breaks and some of the yolk gets on the ground. But when the fat player starts eating it, the whole yolk's on the shoe. (00:33:30)
Continuity mistake: At the beginning of the match Shawn comes down and gets set on fire. Straight afterwards and during the match there are no scorch marks, but at the end of the match, when King grabs the belt, there are.
Continuity mistake: In the scene where Coach Jones finds Radio in the shed, he pulls out his knife to cut the tape. In the first shot you can see the blade out. As it switches shots you can see him pull out the blade, then it switches back to the previous shot of the blade already out.
Continuity mistake: When Ted is out mushing with the dogs, the dogs take off after a fox. Ted tries to stop the dogs with his hook. He gets dragged behind the slide with the hook hooked to his right boot, then it cuts back and its hooked to his left boot and then back to the right boot.
Continuity mistake: At the least swim meet, Chaz is shown diving before Jason Melon. Howver, after Jason dives, it then shows Chaz "up next" - and his hair is completely dry.
Continuity mistake: When Nitro is being sent to another prison, as he is put into the back of the van the prison guard on the right has his hat knocked off, but as he closes the door his hat is back on.
Continuity mistake: Near the end of the race, the cars are clean and dirty in the same race lap.
Continuity mistake: In the race for the $100,000 purse (that Rosemont wins), just after Seabiscuit takes the lead, there's a closeup of Seabiscuit's head and Pollard's right leg - Pollard is wearing the brace he made later in the movie after his leg was shattered. Obviously, the shot was taken from those filmed for the Santa Anita race later in the film. (01:17:40)
Continuity mistake: At the place where Libby's birthday is being held, when Dennis and Gordon are talking to Libby and Whit, the pictures behind Dennis and Gordon keep moving positions.
Continuity mistake: In the scene that takes place right before the big game with Georgia Tech (the game Rudy plays in), the stadium shows the Penn State Blue Band on the field playing the Penn State fight song. The game then starts and Notre Dame is playing Georgia tech. (01:39:20 - 01:41:00)
Continuity mistake: In the scene where Randy is playing table tennis on the stage at the restaurant, just after he has finished hitting the ball blindfolded and says, "Thank you", you can see a man in the background getting up. The shot then switches to the boy with the man in the background still sitting. The shot then switches back to Randy and the man is getting up again.
Continuity mistake: When Tonya's husband is fixing the car, his tool box disappears when he goes to close the hood.
Continuity mistake: At the end of the final match, the announcement is made it's the first time in history the defending champion kept his title. Yet in Karate Kid 1 Johnny Lawrence had already won the championship twice and was there for his 3rd time.
Continuity mistake: During the lunch scene, when Jake is drinking Gatorade, the amount of liquid continuously changes between shots.
Continuity mistake: In the 1924 Olympics, the Eric Liddell character is handed a slip of paper prior to running. As he runs in the race, the paper is not in his hand. When he crosses the finish line it magically reappears.
Continuity mistake: When Mae is at the sink washing dishes and, behind her, Braddock is teaching his kids how to box, Mae turns around and emotionally yells, "No boxing in the house!", the strap on the apron she is wearing is twisted. They cut away and in the next shot the strap is no longer twisted.