Yup! This clearly shows his trouble with the breaking ball and changeup this year. I bet in the American League he's getting way more off-speed pitches than he got in the NL. Add to that he's forcing it.
"He has been struggling to hold off on slow pitches outside the strike zone. After chasing only 28 percent of offspeed pitches outside the strike zone last year, he has swung on 31 of 62 such pitches so far this year. Two of his three hits against offspeed pitches this season are on pitches outside the strike zone … on those inside the zone, he is just 1-for-19."This would be why he's not walking.
http://espn.go.com/blog/statsinfo/post/_/id/42807/offspeed-pitches-have-pujols-off-base
