Is there a reason that this guy couldn't be the closer?
not really. there's going to be skepticism about him because he was so mediocre as a starter, but he's been a terrific reliever the past couple of years. People had the same doubts about Andrew Miller for a long, long time. Granted, Miller was younger and supposed to be elite when he was drafted, but he could only get a AAA contract going into 2011 when he was converted.
I'm also a Kelley fan and think a lot of Treinen and Glover. I like using Blanton as a stopper / fireman rather than a closer, so I'm good with Kelley or one of the other options as the save accumulator.