Thanks for the comment-I must admit, I always thought RGIII had more pure passing ability than Kapernick, but thought once he got injured, was unable to get his mechanics right and became more erratic and inaccurate. (It was his knee, IIRC)
Either way, you cannot last in the NFL as a running quarterback, Fran Tarkenton, Bobby Douglass, et al not withstanding. College, yes. Pros...no.
Randall Cunningham, Michael Vick, Roger Staubach, Aaron Rodgers. I think you can be a scrambler and have a long career, so long as your first instinct is to step up in the pocket. But you can’t last if they make you one of the running backs, and that’s what read option does.
As the very good breakdown above says, Rectum Kaepernick was fine until DC's realized he was not running to extend the play, but was running simply because did not know where to go when his primary receiver was covered.
Once a DC figures that out, you no longer have to cover the downfield receivers plus the quarterback -- which leaves you with a one man disadvantage. You figure out who the primary is (which Kaepernick telegraphs by a mile) and you cover him. The entire rest of your defense is then available to concentrate on containing the QB and any easily found outlets.
Kaepernick is not playing because he is a liability in every conceivable way. That's all there is to it.
I was glad to see Russell Wilson learning that lesson.
He has a superb arm and great accuracy.
His biggest problem is that his O-line is possibly the worst in football and he HAS to run.
The pocket collapses in seconds. He ended up with an injury that I believe cost the Seahawks at least a few wins last year.