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The Mets have a fourth All-Star. 

Starting pitcher David Peterson is headed to the Midsummer Classic in Atlanta, replacing Giants hurler Robbie Ray as a reserve. 

The southpaw, in his sixth season with the Mets, has compiled a 3.06 ERA with 93 strikeouts in 18 starts this year.

This marks his first All-Star nod. 

Peterson joins Francisco Lindor, Pete Alonso and Edwin Díaz as the team’s All-Star representatives.

The Arcadia, Calif., twirled a gem on Thursday afternoon, striking out six over seven innings while getting charged with one run.