I will start by admitting that I am an OU homer. Have been for years and will be for hopefully many more. That being out of the way, I am going to try to keep my "Sooner side" out of the reasoning for not trading Sam Bradford.
First and foremost, we can't. Do you honestly think after the year he has had, another team will even think about his EXTREMELY expensive contract?
Second, has he honestly had a fair shot to succeed this year? According to Lloyd, Josh McDaniel's offense "counts on people winning individual match-ups". The quote can be found in a twitter conversation a few months ago. Who exactly do we have that can win those match-ups? Even completely healthy I can only think of 3 who might have a chance, and 2 are injured right now. Watching our tight end run last night was like watching a D-tackle return an interception.
That brings us to our third issue. Injuries. Pick any team in the NFL and take out their 2 starting tackles, starting guard, two starting wide-outs and their best receiving tight end, then tell me how their QB looks. Sam may be an All-Pro someday or he may be a total bust, but the point is it is too early to tell. Last year he was in a safety offense with dink and dunk passes. This year he is in an offense where the plays and routes take a long time to develop, with a line that gets their ass handed to them on a weekly basis. If a move were to be made in some weird turn of events, and they could unload Sam to, lets say Seattle; are we sure we would want to face him with a healthy line and Seattle's receivers?
Finally, it looks like he will probably get his 3rd Offensive Coordinator in 3 years. Would you rather teach a new system to someone who has already learned two others, or train a rookie fresh out of college? Don't get me wrong, I think Luck and RGIII will be great eventually, but if they were put in the same situation Bradford is in right now, I can all but guarantee they wouldn't fare any better. Yes RGIII can run, but so can Michael Vick and Cam Newton and last time I checked - one has never been to the Superbowl and the other has a losing record. We need to give Bradford a chance to succeed. Break the bank in free agency and the draft on O-linemen and receivers. Get a dedicated QB coach to help him with reads. Design an offense that suits the strengths of the team. The worst thing that can happen is that Bradford is indeed a bust and we trade up for the next big thing at QB with the rest of the tools in place.