Acquired by Cleveland from the Los Angeles Dodgers last month, Syndergaard, a 2010 first-round pick of the Blue Jays back in 2010, is 2-6 with a 6.50 ERA this season. He made six starts with the Guardians, winning just one.
Syndergaard, 30, made his major league debut with the Mets in 2015 and in 2020 he opted for Tommy John surgery, missing the pandemic-shortened season.
Cleveland will need to make a corresponding roster move Monday to fill Syndergaard’s spot.
Long after Syndergaard exited the game, Kole Calhoun hit a tiebreaking double in the 11th inning to lift Cleveland to Sunday’s win.
Calhoun said he hoped the victory would energize Cleveland before a three-game series at AL Central-leading Minnesota that begins Monday.
“Huge game,” Calhoun said. “Hopefully, we can use that momentum as we roll into the biggest series of the year for us right now. It’s a game you can definitely build on.”
The Associated Press contributed to this report.