If Braun's offense wasn't good enough to make up for his defense, than Weeks offense isn't either. I don't think this is a fair comparison. Braun's D was historically bad, but so was his offense (but good). Braun has not struggled at any point in his career (for extended periods) and I think his O has outweighed his D -- that said, I think it is clear that moving Braun has maximized his overall contribution. My point is, based on what I have seen of Braun, I think you get his bat in the lineup no matter where he plays. Weeks however has not performed at the same level as Braun. Weeks D is subpar at best, and there probably is a point where if Weeks struggles offensively (for whatever reason), he can easily be replaced.