Related Clues:
- Worker with a whistle
- Caller of 1-Down
- One crying foul?
- Play policer
- Say no to iron getting turned into 11
- 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
- Frequent whistle blower
- Concerned with following man on the pitch
- Whistler on a field
- Official with a whistle, for short