"When it's a groin, it's severe when you're a pitcher," Collins said. "They don't heal real fast, so that's certainly going to be an issue."
The Mets will have decisions to make on who will fill the final spots of their bullpen on a possible playoff roster, should their 8 1/2-game lead in the National League East hold. It is possible that New York will not carry a left-handed relief specialist, a position the club has struggled to fill due to injury and ineffectiveness.
They have lost two pitchers to Tommy John surgery, Josh Edgin in Spring Training and Jack Leathersich in late July.