‘The most frustrating man I ever played with’

Keith Hernandez played the game as if his hair was on fire. It killed him to watch teammates who didn’t hustle. One former Mets teammate especially unnerved him.

Keith Hernandez was once quoted saying, “I’ll quit before I quit.”

“I had a lot of trouble breaking into the big leagues, but I never quit,” he said.

There was never — ever — a question whether Hernandez gave his best effort on the field. Every pitch, every inning, every game he busted it; and he expected no less from every teammate.

Especially, one of his Mets teammates …