Related Clues:
- Tag callers?
- Officials who cry 'Steee-rike!'
- First, second and third, but not fourth
- Judges those who steal
- Ballpark arbiters, briefly
- Fenway arbiters
- Diamond heads?
- Ones making some safe decisions?
- GIs' places
- Officials on a diamond
- Fundaments
- Some Little League volunteers
- Out callers
- Substances high on the 49-Across
- Callers of strikes and balls