It's actually a good article on whether college QBs can develop in the NFL.
The Ringer wrote:
SageSage Rosenfels believes quarterbacks can become significantly more accurate in the NFL. After all, he managed to do so as a pro.https://www.theringer.com/2021/4/28/224 ... falo-bills
When Rosenfels was in college at Iowa State, he never had better than a 54 percent completion percentage. But Rosenfels spent nearly a decade in the NFL as a backup quarterback, and in 2007, when he saw his most single-season action (five starts for the Texans), he completed 64 percent of his passes. While completion percentage is not a perfect gauge for a quarterback’s accuracy, the two are related. And Rosenfels says his improved accuracy came from a combination of physical and mental changes that altered both his outlook at the line of scrimmage and his abilities as a passer.