Nathan Bannister, a senior right-handed pitcher for the Arizona Wildcats, was taken by the Seattle Mariners in the 28th round of the MLB Draft.
Bannister was passed over in the draft last year despite going 7-5 with a 3.98 ERA in his junior campaign at Arizona, and after having a dominating summer in the Cape Cod League (4-1, 2.37 ERA) the year before.
Many players have benefited from the new Arizona coaching staff coming in this year, but I don't know that anyone has benefited more than Bannister. Over the course of his senior year, Bannister has turned into a dominating pitcher, and has also picked up about 3-4 MPH of velocity on his pitches, now running fastballs up to the plate at 87 or 88 MPH.