Shawn Tolleson had a great year and is a solid back end reliever. He's not blow you away dominant, but he's a key reliever and he can get saves. One of the better success stories of the year. Of particular note is how he cut his walk rate. Not sure that's sustainable, but it sure was nice this year. I'm also a little concerned his arm is going to fall off considering how much he's been used, but such is the life of a reliever.
The commenter who came the closest in projection was: Baseball North!