Oswalt was drafted by the Mets in the seventh round of the June draft back in 2012. He worked his way through the system and made his Major League debut with New York back in 2018 as a 24-year-old. By the time he made his debut, he was the Mets’ 16th-ranked prospect, per Baseball America.
He made 12 starts and five relief appearances en route to totaling 64 2/3 innings in his rookie season, but only received spot time in the bigs since then, never making more than a handful of appearances. He did, however, appear in each of the last four campaigns with the Mets, and they remain the only professional organization he has appeared with in the bigs. In total, Oswalt owns a 5.89 ERA/5.39 FIP at the game’s highest level.
He started this season with the Giants Triple-A affiliate before the Phillies purchased his contract. Between the two clubs, the now-28-year-old Oswalt posted a 6.11 ERA over 35 1/3 innings. With the Rockies, he should have a clearer path to Major League innings.