Yankees manager Joe Girardi has put reliever Joba Chamberlain on notice that his role as the team's setup man could be in jeopardy. "I'm not saying on a daily basis I am going to change our eighth-inning guy, but you have to earn your roles here," Girardi said. "And we evaluate on a daily basis." Reliever Dave Robertson has gone 1-1 with a 2.70 ERA over his last 22 outings.