It was a good Don Florence joke. He was my initial guess (I was flummoxed when they let him go after he went, I think, 3-0), but I was thinking, "Did the Mets have a reliever named Gambino?"
Leftover 12: Dave Eilers (who I conflate with Dave Eiland, who I kept thinking of before landing on Billy Connors when the clue was MFY pitching coach).