AJ. Burnett had an average walk rate of 4.70/9 before 2004.
Ryan Dempster about 5.12/9 and he was god awful during that stretch.
Aside from 2001, (24 IP) Beckett never had a walk rate above 4
Penny similarly had only 2000 as a year with at least 100 IP and was mediocre.
This thread is nothing about saying that Sanchez will suck in the future, but that he's not ready and don't expect much from him this year. Unfortunately if he keeps going like this, his ERA will balloon.