Watching Sanchez reminds me of Chris Carpenter's early years. Carpenter struggled with control then, only found command several years later with the Cardinals, was never a high K rate guy, known for inducing weak contact.
Carpenter had a two seam fastball, 12-6 curve, cutter early, added 4 seam and change later for a 5 pitch mix.
Sanchez doesn't quite have Carpenter's height (~2" difference) and has a couple MPH more on the fastball.