May (triceps) was reinstated from the 60-day injured list Wednesday, Anthony DiComo of MLB.com reports.
The right-hander was sidelined since early May due to a stress reaction on the lower portion of his humerus but began a rehab assignment in late July. He posted a 4.50 ERA and 1.25 WHIP in four innings over four rehab appearances and will rejoin the Mets' bullpen ahead of Wednesday's series finale in Washington.