Pat Neshek, closer of the Rochester Red Wings (Twins AAA, International League) is just dominating this year. He's thrown 19 innings, allowed 15 hits and 7 walks, and has struck out 39. That's a K/9 of 18.47 for those of you keeping track at home.
I got a chance to see Neshek throw a few innings in spring training, and I was really impressed. He's got just about the funkiest delivery you'll ever see. The ball absolutely explodes off of his hand though. He reportedly hits 96 and sits 93 with a sidearm delivery, which is not easy to do.
He's still got some control issues (7 BB in 19 IP) but it looks like the Twins have another good young reliever in the pipeline.