In his latest work, Mike Newman at Scouting the Sally has some stuff on Braves pitching prospect Arodys Vizcaino. It's certainly worth a click to read in full, but it includes this:
"A scout I spoke to recently mentioned Vizcaino looked like a reliever early on in a recent start, but his breaking ball grew on the scout to the point where his mind was changed by the end of the outing. With seasons evaluators now believing Vizcaino can stick in the rotation, his prospect status has certainly increased."
Vizcaino's injury history and mechanics say otherwise to me, but knowing that his stuff can project as a starter to a scout is pretty big. At this point, I'm sort of on the fence as to whether he will remain a starter, but his potential as a reliever is so huge, it's impossible to ignore.
After posting a 2.45 ERA and 37/10 K/BB in 40.1 IP at Class-A+ Lynchburg, Vizcaino has thrown 25.2 innings for Double-A Mississippi, posting a 3.51 ERA and 27/8 K/BB.