Originally Posted by hradhak
To date, no running QB has had a productive career in the NFL. RG3 is the best pocket passer of any mobile QB, but he needs to sit in the pocket and let his talent as a passer dictate his career
I would say you are 90% correct. I guess the best distinction is running QB v. scrambling QB. There have been lots of very successful scrambling QB's - Rodger the Dodger Staubach, Fran Tarkenton, Steve Young. All were accomplished passers who resorted to running rather than running QB's.