His control will keep him from being a closing type of reliever if he doesn't turn a corner in that area. Ronnie Martinez was much more impressive last night with five great innings of one-hit relief. I know he is up/down alot but he seems to have a good feel for pitching, changing speeds, etc.
If the idea for Paulino is to be pitch relief, he should pitch relief and not start every fifth day. I'm thinking the Astros are considering him for starting at this point.