It's a big deal because he would of been better off in Denver, They offered him a good contract. He also knew the system and already was doing good with it. Now he is stuck with an awful coach, who's system is impossible to understand, who will also be fired before seasons end. Brock is going to end up like FITZTRAGIC, while Denver keeps winning with a guy who's getting paid pennies compared to him.
I thought O'brien was supposed to be something of a quarterback whisperer, or maybe I'm confusing him with someone else.