The 24-year-old Denver native spent 2019 at Double-A Binghamton, where he posted a 3-6 record in 24 starts with a 4.19 ERA. He also posted a 3.46 ERA in four starts in the 2019 Arizona Fall League.
Injuries to starters Noah Syndergaard and Marcus Stroman this offseason already had the Mets scrambling for a fifth starter before Opening Day. The club optioned potential spot-starter Corey Oswalt on Sunday night after he gave up five runs on seven hits against the Braves, making room for Peterson’s debut.
If he performs well, Peterson might make a case to stay in the rotation until Stroman makes his return from the injured list or if Rick Porcello continues to struggle.