Jacoby Ellsbury studied Andy Pettitte's slow windup. He took a few steps toward home. Then he took off. The Red Sox speedster slid headfirst, stirred up a cloud of dirt and looked at plate umpire Gary Cederstrom. Safe. "The biggest thing is getting the courage to go, I guess. In that situation, bases loaded, you've got to make it," Ellsbury said. Justin Masterson (2-0) pitched 5 1/3 innings in his second start in place of Daisuke Matsuzaka, who is on the disabled list. Pettitte (2-1) dropped to 17-2 in 24 starts when trying to prevent the Yankees from getting swept, according to Elias Sports Bureau.