Related Clues:

• Short word for cricket arbitrator
• Sports official (abbrev.)
• Match official
• Man on pitch not playing part of centre-forward
• Flagman?
• Official at a base
• Coin flipper on a field
• Penalty flag thrower
• Wrestling figure
• Figure known for calling out?
• One who whistles while he works
• 'Stee-rike!' caller
• Official behind home plate, for short
• Call, as a basketball game
• Whistler's Mother, effective to an extent