Eppler has stated OBP is the best stat for run scoring, Pujols is hitting better than we expected but literally swings at everything. If he regresses his hitting it could turn very ugly since he's not walking at all..
.284 OBP for Pujols in the 4th slot, he's going to have a low BABIP no matter what due to his MLB worst speed so I honestly can't see how he's going to be positive overall offensively unless he starts walking more.