He's having an awesome year. Just put a foot on the throat of arguably the best 2-3-4 (Hunter, Cabrera, Fielder) lineup in baseball.
The Nats Rizzo must be kicking himself for not calling him up last year from Syracuse thus letting him walk to the Pirates. At the same time I would have never guessed he would be throwing 95 at 36yrs old or that the Nats pens would implode this year.
Disclaimer: I'm biased as he used to show up to my little league games and volunteer coach our team during his BVille days and Freshmen Year at the Hall.