True but it doesn't really make sense for a QB to drop off like Russ has. At least they have hope that the next head coach can help replicate what he did in Seattle.
Saints and Cowboys did it last year. I'm just going to assume they'll pretend today's a Monday after a Sunday. Practices on Sunday, Monday, and Tuesday.
He's a slightly above average NFL starting MLB. I expect a drop off in play at any position when a starter goes down when you've built your roster adequately. The question for Beane will come down to compensation and the belief in your plan to replace him if you can't re-sign him.
If it is a mental thing then the Bills are doing the absolute right thing in not playing him. Get him whatever help he needs to get back out there because once he plays a game my guess is he'll be fine after that.