He was a failed starter who had posted a 5.70 ERA (4.69 FIP) with a measly 1.40 strikeout-to-walk ratio and 0.91 home runs allowed per nine innings. Once he was transitioned to the bullpen on a full-time basis, however, his ERA and FIP dropped to 2.43, his K/BB ratio rocketed to 4.04, and he gave up only 0.69 HR/9. Nice.
You can see how the Cubs might like to add an arm like that to a bullpen, especially after getting an up-close look at him in the playoffs. There’s just one problem: Andrew Miller is still under contract through 2018 and it’d take too much to pry him loose from Cleveland.