Related Clues:

• Decide on close ones
• Replay reviewer, at times
• Basketball judge
• Court presence, briefly
• Enforce the rules
• Ump kin
• Shot caller
• The third man in the ring, briefly
• He'll let you know if you're out of bounds
• Ring judge
• Judo official
• Volleyball VIP
• Clock stopper, at times
• Fairness determiner
• Ring figure, for short