The 2019 Mets sent 23 different relief pitchers to the mound over the course of the season, so you could be forgiven for forgetting a few of them. Some of them had distinguishing features: Daniel Zamora is the other lefty, Tyler Bashlor has a tattoo sleeve on his pitching arm (and is hot), Jacob Rhame looks like a background character in The Office, Chris Mazza wears stirrups, Walker Lockett starts sometimes, Brooks Pounders looks exactly like he should, etc.
And like that collection of indistinguishable older relievers, Peterson was nothing special in 2019. The righty threw 7.1 innings in 6 appearances. He gave up four earned runs in that time, which translates to a 4.91 ERA. Half of those runs came on the lone homer he allowed, a two-run shot by Gary Sanchez in the first half of the Mets doubleheader against the Yankees on June 11. That was also Peterson’s last appearance for the 2019 Mets.
While a 4.91 ERA and just one homer isn’t aggressively horrible for a Quad-A reliever,