Related Clues:

• Judges those who steal
• Ballpark arbiters, briefly
• Fenway arbiters
• Diamond heads?
• Ones making some safe decisions?
• Officials on a diamond
• Some Little League volunteers
• Out callers
• Callers of strikes and balls
• Face-mask wearers
• Who, What and I Don't Know, in Abbott and Costello's 'Who's on First?' routine
• Ball callers
• Superior politicians who enforce the rules?
• Refs
• Calls strikes