anyone who thinks his poor results are due to him throwing an 89 mph fastball instead of a 90 mph fastball is fooling themselves. and based on his trend of decreasing velocity and his age, it should have been expected that he'd sit around 90 mph on his fastball
i think many yankees fans were excited about how well he did in the national league east and his war values. i heard many even make the claim that he was an ace. but it just goes to show you how different the two leagues are and value stats like war, fip, etc. can sometimes be quite innacurate in evaluating the abilities of players.
sometimes you just have to use common sense - if he couldn't provide league average innings in the american league in his prime why would anyone expect him to provide league average innings at age 34 when his velocity was 91 mph and decreasing