Is a lack of defined roles hurting the pen?

From Marc Carig:During games, the Yankees bullpen remains a lively place. The relievers still swap stories, they still chatter, they still joke. And those who grow tired of the obstructed view from their seats don't hesitate to improvise, standing on benches they've moved against the fence so they can get a better view. But lately, in light of their struggles, there has been a difference in the mood. "Even though it's loose, you can see it in people's eyes," lefty Phil Coke said. "As soon as that phone rings, it goes dead silent."... "We're getting used in such a different fashion every time we step on the field," said Coke, who admits that in several instances this season, he and his colleagues may have been caught mentally unprepared. "We've got to be ready to go from the first inning."Coke said he tries not to get too caught up in which role he is used."I feel my role is in the seventh inning, and I've got t...