With their bullpen battered, the Mets are calling up a reinforcement from Las Vegas, The Post has learned.

Right-hander Tim Peterson will join the team Wednesday night in Atlanta.

Peterson, a 20th-round pick in the 2012 draft, has put up a 3.58 ERA in 22 games totaling 27 1/3 innings for Triple-A Las Vegas. He has struck out 40 and walked eight