After improving virtually every season since 2005, Dan Haren finally hit a wall in the first half of 2010. In 21 starts for the Diamondbacks, Haren went 7-8 with a 4.60 ERA and a 1.35 WHIP (highly uncharacteristic of him). As he was still striking out a batter an inning, the Angels saw enough in him to acquire him at the trade deadline. The Halos faded in the second half, but Haren rediscovered his old form.
In 94 innings for the Angels, Haren posted a 2.87 ERA and 1.16 WHIP. He simply does not beat himself, as his career 1.19 WHIP shows. Haren's nemesis has always been the long ball, and he coughed up 31 of them in 2010, though only 8 after the trade. 2010 was a rough year for the Angels, but with Haren, Jered Weaver, Ervin Santana, and Joel Pineiro all in the fold going forward, they could very well be back with a vengeance in 2011.