The Mets designated Reed for assignment Sunday, Deesha Thosar of the New York Daily News reports.
His removal from the 40-man roster clears a spot for left-handed reliever Sam Clay, whom the Mets claimed off waivers from the Phillies. Reed was tagged for eight earned runs on four hits and six walks over 6.1 innings with the Mets this season before being optioned to Triple-A Syracuse on Friday. He'll remain with the organization if he isn't traded or claimed off waivers in the coming days.