Well, since I can't tell you what he's holding opponents to scoring-wise and field goal-wise, I'd say they're the best indicators out there... unless you have something better.
Were any contending teams trying to sign Dunn? If not, you can't blame him for signing with the Nationals.
I seem to remember him being interested in the Cubs. But Hendry's a dumbass and went with Milton Bradley, who probably won't even play 100 games.