I do pretty much agree with what Jimbo said above. Pelfrey's fastball is OK, but it isn't dominant. His breaking ball isn't a plus pitch, so he went with the split-finger. However, he's never had command of the split, he got a lot of people to swing at it, but not many were in the strike zone. The key here is that in order for the split to be at all effective, Pelfrey needs to be ahead in the count. It seems he has been 2-0, 2-1 almost all the time. Both control and command of his fastball have been issues in the second half of the season.