McWilliams came to the D-Backs via the trade when Jeremy Hellickson was sent to the Philadelphia Phillies in November 2015. The right-hander was an 8th round pick in 2014 and the first high schooler taken by the Phillies. Scouting reports prior to the draft indicated that McWilliams was definitely going to be a project. A tall presences on the mound at 6′ 7″ 190 lbs, McWilliams has come a long way and now displays a power arm with a solid above-average curve. In the game last night, his fastball consistently registered in the mid-90’s in getting 8 K’s over 5 IP.