Make them throw in a prospect say...a Scott Sizemore, or a Matt Joyce, then I would. But trading a young, cheap valueable arm for a free agent to be EXPENSIVE SS is NOT an ideal trade, IMO. So again, if Detroit is willing to throw in a solid prospect with Renteria, then yeah I would Marmol for Renteria/prospect. But the first goal, should be to trade Dempster before considering moving Marmol. Marmol is a reliever. Renteria fills a massive gaping hole. It's a no-brainer. Yeah, he fills a hole. But to plug up that hole by trading possibly our best reliever? Who also makes $9 mil less? No dice, unless they throw in a decent prospect. If Wood craps out and/or someone gets hurt, the pen becomes thinner without Marmol there.