I gotta weigh in with a few points.
First, you can never "negate" movement and velocity by how many men you walk. It might drive you f***ing crazy as it does me, but that statement just isn't true. Second, it's simply not luck when you have a guy that walks the bases loaded and repeatedly gets out of it with his penchant for drawing groundballs off of bats. It's actually quite the opposite.
As a hitter, I always knew that I was going to get a lot of fastballs when there were guys on in front of me. I know in the majors, great pitchers with confidence in all of their pitches will pitch backwards, but much more often than not, a pitcher will throw more fastballs with guys on or the bases loaded. This is precisely what Sanchez did on several occasions and guys still couldn't hit his sinker with any solid contact. When you have MLB hitters, knowing what's coming, and they still can't hit it. Yeeah, you're lucky once, twice, maybe three times, but when it becomes repeated? It has absolutely nothing to do with "luck"
Why do you think guys still can't hit him when he comes out of the pen? His sample size isn't huge, but his numbers are top three in all of baseball in just about every category. If this kid could start with the mindset he has out of the pen? Leads me to believe there is some sort of block there on him mentally where he tries to do too much, because he is a completely different pitcher coming out of the pen.
Third, his K rate has nothing to do with what kind of pitcher he is. That number will rise dramatically when he gains confidence in his curve and hopefully develops another pitch. Anybody who's ever played the game will tell you he'd rather have a guy on the mound who pitches to contact. It both keeps the defense alert and keeps the pitch count down. I'd rather a guy throw a few pitches per AB and induce ground balls then a guy who strikes out 10 per game averaging 4.5 pitches or more to get the strikeout. Halladay was a classic example of a guy who pitched to contact. When he got into his prime, he struck out his share with the development of his curve, and so will Sanchez.
Aaron's curve is miles better than any of Hutch's secondary pitches and his fastball has more sink on it than Hutch's change. It's not luck that Hutch gets hit harder than Sanchez and it's not luck that Sanchez doesn't get hit as hard as Hutch does in the reverse. Sanchez draws much weaker contact for the sole reason that he has miles and miles more movement on his pitches and nothing "negates" that. Have Hutch throw nothing but fastballs and he gets f***ing creamed. Sanchez gets away with it because when his sinker is on, it's coming in at 96-99 MPH with more movement than most pitchers breaking balls. I don't get all the bitching and hate for Sanchez. I understand his walk rate is maddening and makes you want to shake him but he's one of ours and as a Blue Jays fan, we should be rooting and pulling for him instead of carrying on about how much he sucks.
He's still 4-5 years out of his prime and I'm betting that he gets it. It's simply a mental adjustment for his and the proof is his dominance coming out of the pen late in games. Him and Stroman are good friends and hopefully Marcus and the pitching coaches help him get where he needs to be. When he does, he's going to be a beast for years to come.