The Mets designated Severino for assignment Saturday.
The Mets added the 31-year-old southpaw to the 40-man roster May 19, but he'll now lose his spot in favor of Cionel Perez without ever receiving a promotion to the majors. Severino has been extremely effective at Triple-A Syracuse this season, posting a 1.31 ERA and 1.09 WHIP through 20.2 innings, making it possible that another team will claim him off waivers.