He may be a little to combustible to be a great closer. He tends to dominate and cruise for 5-6 innings then give up 4 runs in the next inning with 2 outs and no one on.
I hope that he recovers quickly and comes back strong but I doubt they will convert him into a closer unless they asolutely have no other choice.
"Think of how stupid the average person is, and realize half of them are stupider than that." ~George Carlin