Casey Kreiter’s ‘dream’ Giants run at the NFL’s oddest position almost never left the classroom

He was a walk-on, deemed unfit to play the first three downs, undrafted, then unsigned for the better part of two years.

Casey Kreiter believed he belonged, as one of 53, as one of the NFL’s 32 long snappers.

The substitute science teacher chased his dream in a 9-year-old clunker.

“I was subbing in a new school, and I introduced myself and told them my background,” said Kreiter, who had been released twice by the Cowboys (2014-15) without making a regular-season roster. “One of the students raises his hand and says, ‘Hey, it says here on the Internet that you signed a three-year, $2 million contract. Why are you here?’