Until Tom Brady himself actually tells us, we'll never truly, officially know why he decided to leave the New England Patriots and sign with the Tampa Bay Buccaneers. We do have a few good theories, though. He may have wanted to find a place where he'd have more input as a veteran QB. He could have wanted a new challenge, since he'd been with the Pats for 20 years and won everything there is to win multiple times.
Clyde Christensen, the Bucs QB coach, believes he knows at least one of the reasons Brady left, because he heard it from Brady himself.