When Saint Tommy comes marching in to Eli Manning’s old hometown, mesmerized Giants fans will be gazing at him as their Saint Tommy  the patron saint of cutlets.

Tommy DeVito turned MetLife Stadium into the Mardi Gras this past Monday night, and come Sunday against the Saints, he will try to turn the Superdome silent.

His It Factor is just his ability to be a gamer … some guys, they’re just gamers,” rookie Eric Gray said.

Though DeVito has not been here before, he sure acts as though he has been here before.

No moment has been too big for him, and with the game on the line against the Packers and MetLife all but genuflecting in prayer, you could have called Tommy DeVito

“The Big Easy” with the way he marched his team down the field in position for Randy Bullock’s decisive field goal as time expired.

“He just doesn’t seem like he’s too rattled, whether it’s like a three-and-out, whether it’s a big game, whether it’s a bad game, whatever it is,” Isaiah Hodgins told The Post,

“like he’s just never really rattled. You can’t really teach that in a quarterback, you either got it or you don’t. And he’s got that.”

Rocky? Rudy? Vince Papale in “Invincible”? The Karate Kid? Tommy DeVito has taken the underdog torch and run with it, with underdogs everywhere cheering him on.

“He’s just one of the guys,” Robinson said. “He’s just a cool dude, funny. … I mean, he’s just another one of us.”

Don’t bother telling the Italian-American community in and around Cedar Grove, N.J., who can’t stop mangiare (Italian for eating up) this fairytale, that Rome wasn’t built in a day.