Plot hole: In the game against Fayetteville, Crash puts down two fingers indicating he wants Nuke to throw the curve. When the camera then shows Nuke shaking him off, you can see Fayetteville has a runner on 2nd. Even in the minors the catcher will mix up the signs so the runner on 2nd couldn't steal them and tip the pitch. He'd never just hold down two fingers.
Bull Durham (1988)
1 plot hole - chronological order
Directed by: Ron Shelton
Starring: Susan Sarandon, Kevin Costner, Tim Robbins, Trey Wilson
Factual error: In the opening narration, Annie Savoy states, "...there are 108 beads in a Catholic rosary and there are 108 stitches in a baseball." While it's true that a baseball has 108 stitches, there are only 59 beads in a Catholic rosary.
More quotes from Bull Durham
Trivia: When the film was shown during the 2003 Baseball Hall of Fame ceremony, Susan Sarandon and her partner Tim Robbins were not invited because of the controversy surrounding their anti-war views on Iraq.