well dropping from his career .406 SLG to a .398 SLG is hardly a trend, that is within expected values. His ISO is probably a better indicator for power since SLG includes singles, his career ISO is .162 and his 2008 ISO was .164 which again is right around career numbers albeit lower than in 2007. Last year his BB% was higher than his career level, K% was lower than career level and ISO was higher than career level and for my money at least his fielding improved. He showed slight improvement in most areas of his game over his career rates, just not compared to the offense of 2007. His BABIP was low last year which is probably what drove the down year the most. In April he was drilling the ball all over the place but right at players (I remember that anecdotally), in May he was grounding out weakly and popping up constantly. Then in June he finally started to put up more normal numbers.