Related Clues:

• Boner
• Dropped pop-up, e.g.
• Screw-up
• Lapse
• One way to get to first base
• Diamond goof
• Diamond flaw
• Fielder's flub
• It's marked with an X
• Kind of message
• Printing goof
• Trial mate
• Baseball boo-boo
• Tit for tat, maybe?
• Cause for a correction