Revealing mistake: When the boys' rival team challenges them, all the boys throw their gloves down, except Yeah-Yeah. When they all go to pick them back up, Yeah-Yeah has to pretend to pick it up.
Revealing mistake: At the end of the decisive game, the bad guy hits a deep foul ball. During that hit, they show the ball against a black background. If you look very closely at the bottom of the screen, you can see a hand throwing the ball.
Revealing mistake: When Junior inadvertently trips Derice and Yul Brenner in the trial run, it's clear that his legs do not come in contact with either men; the actors just threw themselves to the ground. It's particularly noticeable due to this shot being played in slow motion.
Revealing mistake: Just before the start of the final game which is supposed to be in December we see several shots of the parking lot where it is snowing cold and obviously winter, but yet just before the game starts the camera shows a wide shot of the stadium where you can see rows and rows of lush green trees in the background.
Revealing mistake: When Joe drives Camille on his bike, for a brief moment if you look closely a stuntman is driving for him.