David Robertson felt a tug in his left hamstring Wednesday but expects to be available on Friday. The Yankees have a scheduled team off day on Thursday. "I don't feel it right now," the right-hander told reporters late Wednesday night. "It was just a little sore when I got in the dugout so I went to get ice on it to try to keep it from getting inflamed. I'll be ready to go by Friday." Robertson, 28, has posted a cool 3.86 ERA, 0.94 WHIP and 13/2 K/BB ratio across 11 2/3 innings of relief this season.