17. Seattle Mariners: Griffin Canning, RHP, UCLA

Though he's from the same UCLA program that produced Gerrit Cole and Trevor Bauer, Canning’s ceiling is mid-rotation, rather than ace. Though somewhat undersized at 6'2", 180 pounds, this righty is second among all Division I pitchers in strikeouts thanks to a four-pitch repertoire for which each offering has drawn plus grades at one time or another. His four-seamer sits at 90-94 mph and can touch 95, with his changeup his best secondary offering; scouts are split on whether his curve or his slider is the better breaking ball.