I don't get your opinion. Glaus is likely the better player at this point, on a shorter, cheaper contract. How does this hurt, especially for "awhile?" Rolen has a huge defensice advantage if UZR is to be believed. Almost three wins last year. Enough to bridge the gap between a 95 OPS+ and a 120 OPS+. The defensive numbers may not represent a projection, but needless to say, Rolen is superior there by that metric. Some others like Glaus now, but only since he's moved to the turf, which is curious. The rest of how you feel about the trade is entirely speculative on his medical prognosis. The 2006 version of Rolen is worth quite a bit more than any year Glaus has put up. The Cardinals aren't trading him because of straight up analysis and medical projection, but because he doesn't get along with Tony. So, they are already at a disadvantage as Mo likely has a directive to make "the best move possible" and that's it. Within that framework he's actually done really well, IMO, but the framework sucks (and as long as players like Miles and Izturis types are on the roster, TLR directives will continue to hamper the team). What you are left with is just a guess medically, however, the only people that have had doctors look at Rolen and have an objective stance are the Blue Jays. That's scary. It's kind of a catch-22, but if it's a gamble that other teams want to take, it's a gamble that I think the Cardinals should take. He's a 7-win player if healthy. If nobody wanted him, I'd want him moved ... This is not an opinion shared by many Cardinals fans, apparently.