The Mets claimed Warren off waivers from the Giants on Wednesday, Justice delos Santos of The San Jose Mercury News reports.
Warren, who turns 29 in February, yielded two runs with a 7:5 K:BB over 10.2 innings with the Giants in 2024. He'll compete for a spot in the Mets' bullpen but is likelier to wind up at Triple-A Syracuse to begin the season.