The undrafted free agent had a mini breakout season at Double-A Wichita last season and could be a late bloomer in his age 24 season. He had a 3.12 ERA and 95:24 K:BB ratio in 80.2 innings at Double-A, but struggled when called up to Triple-A with a 6.66 ERA and 33:13 K:BB in 25.2 innings. He was a bit unlucky at Triple-A with a .373 BABIP as he had a 3.30 FIP. Klein was used as a starter and reliever in the minors last season. He had a strong 10.8 K/9 overall in the minors which could make him a candidate for the major league bullpen at some point this summer. Read Past Outlooks