A 10-6 team going 4-12 the following season is uncommon, but when the same young core still exists with the same staff then it makes it rare.
Stafford had over 700 pass attempts this season, and nearly 1/3 of those targets were to Calvin Johnson to set Jerry Rice's receiving yards record.
The key that Stafford's unrelentless reliance on Calvin Johnson is the fact that despite nearly 700 pass attempts, he only picked up only 20 TD's.
A lot of questions needs to be answered about whether or not Stafford using Calvin Johnson as a crutch on so many pass plays is causing their offense to sputter. He rarely ever looks off Johnson to even create the impression that he is going elsewhere with the ball.