And Brady isn't a system QB?? I don't think he is nearly as successful on a team that runs an offense other than what the Patriots run. I think Rogers, Brees, Rotheslisberger, Ryan, maybe even Newton and potentially Carr could do just as well on Pats. Some of these guys might do even better because of their ability to escape. Brady is likely going to be the winningest QB of all and by that standard maybe should be the greatest. Subjectively, Rogers can create way more and relies less on routes and scheme so he is the greatest of this ERA. Put Brady on GB and convince his stats are as good as what Rogers puts up. I would add that Cassel was an all pro and Garrapalo is considered the second coming of Brady, both strength the argument that the system is designed for QBs to succeed.