Zack Wheeler is a big name in Mets camp, but until yesterday many of his potential future teammates had never seen him throw a pitch.

It didn’t take long into Wheeler’s 30-pitch live batting practice against Justin Turner, Marlon Byrd and John Buck for the Mets to understand why there is so much buzz surrounding the 22-year-old righty.

“It’s not just him looking like a big leaguer, it’s him looking like a No. 1,” the veteran outfielder Byrd said after batting against Wheeler.

Wheeler dazzled with his slider and curveball, but mostly his 98-mph heat that seems to accelerate just before it reaches the batter. Buck eventually poked a grounder through the infield, but Wheeler otherwise avoided anything close to decent contact.

David Wright, Ike Davis and Jon Niese were among the Mets who watched near the batting cage in what rated as the must-see event of the day.

“That’s the first time I’ve seen him throw in person and he’s got some late life on his fastball,” Turner said. “It kind of jumps on you, and we’re talking the late explosion that [Stephen] Strasburg has on his fastball. I was impressed.”

Byrd compared Wheeler’s heat to Justin Verlander’s.

“It’s a blinky,” Byrd said. “You see it, lose it and then see it at the last second, which makes his fastball, his slider, even tougher to hit. He’s going to be a good one.”