Related Clues:
- 'Out' sources?
- Diamond pros
- National Pro Fastpitch officials
- Callers of balls and strikes
- Centers of operations
- ''Fault'' callers
- Stepped-on sacks in parks
- Dodgers game officials, briefly
- They turn red litmus paper blue
- Keeps track of a count, maybe
- Rules on plays
- Air Force locations
- Bags on a diamond
- They can be loaded on a diamond
- Ones usually found at home