Related Clues:

• Official with a chest protector
• Man calling out many superstars?
• Baseball boobird's target, often
• One working at a base
• One who might err on the safe side?
• Call balls and strikes, informally
• Sports offic
• Sports arbiter, for short
• Much-maligned official
• Person who's critical at first
• Tennis ''out'' caller
• Watch a lot of plays, say
• He calls balls and strikes
• Baseball official, briefly
• Baseball "ref"