Looked over slides at home, say

• Did some diamond appraisal?
• Called out?
• Refereed, for short
• Officiated at Citi Field, say
• Officiated at T-ball
• Officiated in field hockey
• Oversaw a game
• Made calls, in baseball

Wiktionary Word definitions in Wiktionary
vb. (en-past of: ump)