McNab's plight brings to mind the value of Any Reid's coaching. For a decade, McNabb was considered one of the top QB's in the league. Not in the Brady and Manning class, but certainly in the next tier.
The moment he leaves Philly and Reid his production falls off the face of the earth....in TWO places. He's been benched in TWO places where the alternative to him both were horrible. Grossman isn't good enough to keep John Beck on the bench, and TJackson has been a serial failure his entire career, yet both were considered better options than the fading McNab.
That should tell you something about Reid's influence on McNab, because there is no way he could have regressed so quickly physically from 2 years ago. The cause of his horrible play is much more the effect of his mind than his body.
That being said, I liked McNab and thought he had a great run with Philly. I'm hoping he gets to Chicago to end his career with the "hometown team"