Mets reliever Dario Alvarez (groin) will begin a rehab stint with High-A Port St. Lucie and could be out for the remainder of the regular season, Adam Rubin of ESPN New York reports.
Alvarez left Tuesday's game with a groin injury, and it appears the ailment will keep him out for at least the next two weeks. He could be available in the postseason depending on how far the Mets advance, but it's possible the lefty may not pitch again in the majors until 2016.