I don't have any explanation for this, but this is certainly the weirdest split I've seen this season, and I wanted to see what this community thought. Check out this split on Daniel Murphy.
8/1 - 9/21: .297/.309/.516
Murph has exactly 2 unintentional walks since July 31. His power over that stretch is actually respectable, and could even be passable for a first baseman if sustained (average isolated power for a 1B in 2009 is .208). But what happened to the patient hitter from the beginning of the season? Is this just a fluke? Or a change in approach? Could he possibly combine the best of both worlds?
I suppose we could write it off as "small sample," but this seems awfully strange.