
Originally Posted by
Oldfan
Whatever Steve Young brought to the 49ers, mentally or physically, did not change from the person and athlete he was in Tampa Bay. Let's call that his "potential performance."
His potential performance did not change but his actual performance was greatly improved in San Francisco.
The conclusion to my argument is this: We cannot fairly grade and compare QBs on their actual performances which are so drastically influenced by their supporting casts. One QB might be playing to 80% of his potential while another is at 50%. We cannot tell which QB has the greater potential by watching their actual performances or by looking at stats which measure the actual performance.