Red Sox closer Aroldis Chapman is so locked in right now that he was able to record four strikeouts in a spotless ninth inning Sunday. Chapman struck out all four batters he faced in the ninth inning of a 7-4 win against the Diamondbacks, a feat made possible when he got Ildemaro Vargas to chase a two-strike splitter for the second out and the ball trickled away from catcher Carlos Narváez.