'dhockster said:
I marvel at Griffin's YPA because rookie QB's are usually inefficient because of newness to the league, still developing accuracy, etc.
It's been done a few times by rookie QBs in recent seasons. Ben Roethlisberger - 295 attempts (8.89 YPA)
Robert Griffin - 393 attempts (8.14 YPA)
Matt Ryan - 434 attempts (7.93 YPA)
Cam Newton - 517 attempts (7.84 YPA)
Aaron Rodgers and Colin Kaepernick also did it as first year starters, though neither was a rookie.
This is good company for RGIII to be in. Roethlisberger and Ryan have developed into top 10 NFL QBs. Newton looks like a perennial star. It's pretty hard for a bad QB to fluke his way to a high YPA. You can throw for a lot of yards and TDs on volume alone (see: Fitzpatrick, Stafford, Cutler). However, you can't really fake your way to a great YPA season.
Having said that, one thing you'll notice about the above list is that the YPA drops as the number of pass attempts increases. I don't think it's pure coincidence. I think it makes sense that a generic QB who passes infrequently will be more effective than an identical QB who passes frequently. To use an analogy, it's kind of like a baseball pitcher who sneaks in a curveball occasionally versus a baseball pitcher who throws nothing but curveballs. When the hitter is expecting a curveball, he can prepare for it. When he's not expecting a curveball, he's more likely to be caught off guard. Limiting the curveball to favorable situations is going to result in the pitch being more effective than if you just threw it all the time.
That doesn't fully excuse guys like Luck and Stafford for their relatively poor efficiency numbers, but it's certainly a factor. Put either player in a more conservative offense with a better run game and defense, and I'm certain that their YPA would climb. That's why I think the ROY discussion between Luck and Wilson/Griffin is a lot cloudier than you'd first think just looking at the efficiency stats.