Clarke had surgery in January to address an aneurysm in his left arm, delaying his season debut until mid-July. In four rehab outings, the lefty permitted five runs (four earned) with a 10:7 K:BB over 7.1 innings. Clarke has electric stuff, but he'll need to improve his control and durability to reach his immense ceiling.

The box score results weren't favorable, as Clarke was charged with two runs on one hit and two walks over 1.1 innings. The stuff was electric, however, with the southpaw showcasing a devastating sweeper in addition to premium velocity. Clarke got a late start to the season following surgery in January to address an aneurysm in his left arm and is expected to eventually be assigned to Double-A Springfield. Durability and control have been issues for the 23-year-old, but he could skyrocket up prospect rankings if he's able to stay healthy and throw enough strikes.