At a time when the Marlins are looking for an ace, Henderson Alvarez is assuming the role. The right-hander threw 6 1/3 scoreless innings on Friday night, and the Marlins held off the Mets, 3-2, at Marlins Park. The save went to Steve Cishek, but the game-saving defensive plays were turned in by left fielder Marcell Ozuna, who showcased his strong throwing arm by twice nabbing the potential tying run at the plate.