I went with Arias.
I voted Scott. Basically because he's 20 to Arias's 22, because Scott allowed zero HR, and because I know more about Scott.
cal, can anybody fill in more "story" on Arias? What I know is that:
1. he's tall (6'5") with a strong build for rotation pitching (lists 220)
2. that he throws hard and scouts with some natural sink.
3. That he's kinda raw in terms of offspeed stuff.
4. He's already 22.
For scott, we know he's a South African who picked up baseball late and didn't have tons of coaching. So it's easy to imagine that his breaking stuff is going to be way better at 25 than it is at 20.
But does anybody know how Arias, with his size and velocity, didn't start pros till he was 20? Most Dominicans with his size/velocity are pros at 17 and their offspeed stuff is well developed by 22. Is he as near his breaking-stuff ceiling as most 22-year-old Dominicans? Or is there reason to think that like Scott he's just getting started on his developmental journey, and what he is now may be nothing like what he might end up becoming?