Haren was traded after a breakout season. Peavy has been outstanding for several years now and is a perennial Cy Young candidate, not to mention he won it in '07. What the A's got for Haren isn't a good comparison to what the Padres should expect for Peavy. If you look at Haren and Peavy's PECOTAs before this year, Haren's MORP for 2008-2010 totals to a little over $45M. If you look at Peavy's MORP 2009-2013 is roughly $82M. Now PECOTA is just one projection system and MORP is far from perfect, but I'm just using it as an example of how the two players were projected BEFORE this season. So, as of the trade Haren was projected to be worth $45M and had a $16M contract over the next three years. Peavy (as of last years PECOTAs is projected to be worth $82M and has a $78M contract over the next 5 years. Doesn't matter. If healthy, Peavy is a guaranteed ace. The big market, playoff caliber teams are going to go that extra mile for the definitive #1. Haren, while very good, and a better deal for the $, simply isn't that guy. The market for those guys is different. If the haul is similar, it will be because of health concerns after this past year that Peavy just had. Peavy is probably more valuable, but I think you're overestimating what Peavy has done in the past 2 seasons compared to what Haren has done, especially considering Petco.