Zack Wheeler is finally blowing away the competition.

After a stretch of five shaky starts to begin the season for Triple-A Las Vegas, the Mets’ top pitching prospect had his second straight dominant outing on Sunday, when he pitched six shutout innings against Sacramento.

“Outstanding — the best he’s pitched all year,” Las Vegas manager Wally Backman told The Post yesterday. “He’s turning the corner, that is what we have seen the last two starts. If we see that a couple of more starts, he’s going to be pushing the door open himself, forcing the issue for sure.”

Wheeler is 2-1 with a 4.00 ERA in seven appearances for Las Vegas. Over his last two starts, spanning 12 2/3 innings, he has allowed one earned run with 12 strikeouts and two walks.

“He’s showed excellent command the last couple of starts,” Backman said. “Before he was missing up and out of the strike zone, arm side, all the time and [Sunday] he never missed one time up and out of the zone arm side.

“He kept everything down, threw to both sides of the plate and threw his off-speed stuff for strikes. He looked really good.”