The Red Sox designated Coulombe for assignment following Saturday's 4-0 win over the Mets, Chris Cotillo of MassLive.com reports.
Coulombe finished out Saturday's game for the Red Sox, issuing three walks without allowing a hit over two scoreless frames. Altogether, the veteran southpaw produced a 4.50 ERA and 1.50 WHIP across 22 innings with Boston this season. If he clears waivers, Coulombe could elect free agency and may garner solid interest from teams looking to add a southpaw to its bullpen.