last year in his best season, he was something like 16th among shortstops in WARP. and he was -3 defender whereas Theriot was +1. and i'm considerably skeptical he'll keep hitting 27 HRs rather than his usual 15. im not saying i completely agree with the methodology used to determine these numbers, but those are the only arguments people accept on this board, so i included them for reference. he's reaching his late 20s, which are his prime years. there's no reason to think his numbers would get worse. and in their 2008 handbook, they acknowledge that their defensive system does not properly give him credit, and that he's a very good defender. i think you'd be hard-pressed to find anyone who thinks theriot is on par with greene defensively. 2005: .244/.308/.465/.773 2006: .280/.356/.507/.863 2007: .288/.322/.519/.840 i'm not sure how much more evidence you need. go back through his entire career, and it's very obvious that petco has a very negative impact on his offense. he's a pull power hitter who hits more fly balls than ground balls. there probably isn't a worse place for that type of hitter than petco.