Darick Hall
Depending on who you ask, Darick Hall is either an underrated player ready to break out, or someone who just can't take advantage of the opportunities being offered to him. In other words, he's a talented but frustrating underachiever.
In one respect Hall is limited in what he can offer, i.e. power and only being able to play at first base on defense. On the other hand, he will become an invaluable depth player if he can perform to his potential on a more consistent basis.
The left-handed bat made his Major League debut last year and looked promising enough in 41 games, mostly as a DH. He hit nine home runs and 16 RBI, on his way to a .250/.282/.522 slash line and .804 OPS.
This season Hall has excelled in Triple-A, but not translated this success to the Majors, where he has taken a step (or two) back. We're at a point where a change of scenery is arguably best, if he is ever going to fulfill his potential.