Related Clues:

• NFL official (abbr.)
• Judge of hoops
• Penalty caller, for short
• Third man in the ring, informally
• Note force used by match official
• Yellow card issuer
• Not a team player
• Flagrant caller
• Call a travel
• Traveling caller
• NHL official
• Goaltending caller
• Video replay user
• Lions' zebra
• Hard court judge?