Made lots of calls, in a way

• Decided on a diamond
• Made judgments on diamonds
• Did home work?
• Did some diamond appraisal?
• Helped out at a T-ball game, perhaps
• Made some calls
• Refereed, for short
• Officiated at Citi Field, say
• Called a ballgame

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