Alcantara, 20, has a 5.30 ERA and 18:10 K:BB in 18.2 innings since being promoted to High-A.
The sample size is small over just four starts, though Alcantara has clearly battled control problems. He showed massive strikeout potential at Low-A with 119 punch-outs in 90.1 innings, and thrives when keeping the ball down in the zone. His upside is enormous but he won't make a big league impact for a few years.