Could the Patriots trade Tom Brady in the offseason?

The majority of people who read the title of this post probably uttered one of two things to themselves:1) "What? Stop trying to stir the pot by throwing crap against the wall in efforts to see if it sticks. Moron?"OR?2) "You don't part ways with a three-time Super Bowl champion just because Matt Cassel has had one decent season. Moron?"For those of you that fit into one of the above categories, I don'tblame you for having those thoughts ? or calling me a moron. But justtake a moment and think about the situation for a second, because theidea isn't that far-fetched.There currently is no timetable set for Brady's return after havingseason-ending knee surgery earlier this year. He might not even beready to play at the start of next season, which leaves the Patriots ina tough predicament. Do they allow Cassel to leave via free agency nextoffseason and risk going into 2009 with hopes Brady is ready to play?Or do they allow Cassel to walk, sign a veter...