Not a trade but the Cardinals are calling one of their top rated Propects for the bullpen, Trevor Rosenthal. He's listed by many as our 3rd or 4th best prospect behind Miller, Martinez and Jenkins.
Rosenthal throws a hard sinking fastball at about 95, can touch 98 and throws a slider and a change up.
He could be in the rotation next year, so worth paying attention to him.
Personally I think he could become a weapon in the bullpen, the kinda guy you don't wanna face in 7th, 8th or 9th.
Starter wise I see a 3/4