Yankees right-hander Bartolo Colon is concerned about his hamstring following a horrible appearance against the Blue Jays on Thursday night. Colo recently spent time on the disabled list with a left hamstring injury. "I will wait till [Friday] and see how I feel, but right now I am feeling really good," Colon said following New York's 16-7 loss to Toronto. However, Colon admitted to being tentative with the leg. "There is no pain at all, but every time I react and cover the base I get nervous about it," Colon said. "I think my sinker isn't sinking because I am thinking too much." Colon's evening consisted of two-thirds of an inning, in which he gave up eight runs (three earned) and six hits.