The HR variation is pretty extreme. Which is even stranger considering the park he was pitching in. Also, the K/9 (barely 6 vs. 7+) and WHIP (.28 lower) are pretty extremely different. Like N&G said, as a whole the season isn't even really an outlier, but good lord, the stark contrast in numbers, especially ERA (yes, I know), between the two teams he was with is mind bottling.