Other mistake: Nuke is having a great game. Crash comes out BEFORE the first pitch to the next batter and instructs him to "throw the next one at the mascot." Nuke does. Crash tells the batter not to dig in because he doesn't now where it's going, etc. The next pitch is a strike (making the count 1-1), yet everyone cheers and Crash throws down to 3rd base like it was a strikeout and the batter walks away.
Other mistake: In the beginning of the movie, the catcher is in the dugout eating a hotdog in front of his manager. Pretty gutsy (or stupid) thing to do, since no manager would ever allow his players to eat something like that right before or during a game.