On Keenum- he's a UFA after this year. So they can't trade him before the 2017 Draft. They either re-sign him (if he's OK settling in as a career #2 in this league) or goes elsewhere if he thinks he has a chance to start somewhere. I don't think he'd draw much free agent attention unless he ends up playing a good chunk of this season. I think it would be great if the Rams could re-sign him as a backup.
On Mannion- again unless he somehow plays a big chunk of time in the regular season who is going to trade for him in the 2017 Draft? He played pretty well against 2nd and 3rd team players Saturday. I hope he gets some more work in the next three games but they really have to start giving Keenum and Goff most all the game reps now. Mannion might not even play again until game 4. Could Mannion become their #2 in 2017? Coaches probably have an opinion about that by now.