He's been at an age where most players at his position see their productivity fade ... and yet no player in NFL history has caught more TD's in a 3 year span at any time in history than he has in his first three years in New England - and in one of those years .. he had Matt Cassell playing 16 games.
Cassel is a check down guy - and Moss basically transformed into an outside possession reciever that year and the team went 11-5.
Any smart person in his position in Minny and Oakland would have also been a misfit.