Like I said many times before, there are tons of successful pitchers with a less than K / inning career. Mariano Rivera is one of them. Imagine that, the best reliever in MLB history with a K rate lower than 9. Incredible s***.
Sanchez will get by just fine by inducing weak contact and using the belt high four seamer as his K pitch. You don't need to have a greater than a K / inning ratio to be successful.