Liz is very young and still has a long way to go. Control is usually the last thing that comes to a young pitcher.
Slowey will probably be a AAAA pitcher. He's the guy who will do well at AAA then get rocked in the Bigs.
It's tough to rank these guys, but it'd probably look something like this:
Sanchez looks to have the most polish, best stuff, and is closest to being ready for a starters gig in the Bigs.
Liz has a ridiculously high ceiling, though he still has a ways to go.
Something about Patton just gets me. I think he'll be a helluva pitcher at some point. He should be ready to contribute next year.
If Elbert can ever develop an above-average third offering, he'll be #1 on this list. He's very good in all departments of pitching (stuff, control, poise), but he only has a fastball and a hook, both plus-offerings.
Diamond still has a lot of potential but a couple things bother me. One, he's pitching in Texas, and 2. His control. Still young and can develop. Though I'd rank Danks ahead of him.
McGowan... Not a fan. Should get a chance in the rotation in a second-half, but I don't think he has the stuff to be much of an impact in fantasy leagues.
You have my opinion on Slowey.
Know nothing on Gary Reynolds, just figuring if he was anything special, I'd know something about him.
Oh, and I forgot Fausto - I don't think he has much of a career ahead of him as a starter, but he could be the Indians' closer as soon as next year. He has a good fastball and good breaking pitch.