A 27-year-old right-hander, Buttó is 2-1 with a 2.47 ERA in 31 relief appearances this season, the last a two-inning outing at Pittsburgh last Saturday.

Already running low on pitching, the New York Mets have added starter Paul Blackburn and reliever Dedniel Núñez to a crowded injured list in their latest flurry of roster moves

Amid a series of roster moves Thursday, the New York Mets placed right-hander Paul Blackburn on the 15-day injured list because of a shoulder impingement. The move is retroactive to Sunday. The Mets also placed right-hander Dedniel Nunez on the 15-day IL with an elbow sprain,

That the Mets are asking this much out of their leverage relievers, each in back-to-back appearances no less, in early July spells out what has become clearer and clearer this past week. The Mets cannot afford to wait until the trade deadline to make a move.