Griffin’s offense is much more limited in terms of sets and spread option attacks often do not have a true wide receiver route tree. I thought it to be more concerning after interviewing Baylor's Kendall Wright, who is a top wide receiver prospect in this year’s draft, who said “we don’t have conversion routes in our offense or use a route tree.” A conversion route is a wide receiver route that adjusts depending on the coverage presented by the defense. An example would be a 12 yard out route called to a wide receiver in the huddle designed to attack off coverage. It will convert to a fade route/go route with an outside release versus a rolled up corner.
Therein lies the problem evaluating RGIII. Basically, there are no progression reads to evaluate. Everything is a “bubble screen or wide receiver screen” specifically called to one specific guy. I saw a two-man “smash route” principle where Griffin has to high/low the corner with his progression but that was about it. Worse yet, was Griffin threw a horrible interception in the red zone on a “pop pass.” Griffin’s lone designated receiver was covered and he still threw the ball leading to loss of points for the Bears' and an interception in the end zone.
This was taken from Jim Miller and his tale of the tap between RG3 and Luck. He did this analysis with Pat Kirwan who is a respected NFL guy.
Copied pasted from another site
Exact reason I don't wanna make the trade. RG3 is not the lock
that Luck is so the ransom we would be giving up could be disastrous if he cant figure out how to read nfl defenses.
Stuff he did at baylor was nothing like whatd he have to do in the nfl. No preread adjustments or progressions