May (triceps) will begin a rehab assignment at Double-A Binghamton on Sunday, Tim Healey of Newsday reports.
May has been sidelined since early May due to a stress reaction in the lower portion of his humerus but will throw one inning in Binghamton on Sunday. The right-hander is expected to require 4-5 rehab appearances before he's cleared to rejoin the Mets.