History shows that it is doubtful a frosh QB, even one who excelled pre-mission, will be ready to win most games. Look at Drew Miller. Look at Matt Berry. Look at John Beck. Look at Jake Heaps. All started as frosh. All struggled as frosh. The number of frosh QBs who have excelled at BYU = 0. Taysom won a couple of games as a frosh, but the passing stats weren't that impressive. No double digit win seasons with frosh QB. No victories over the likes of Nebraska, UCLA, or MIZZU with a frosh QB.
When Anae says Mangum will be a quick study, that is his hope because there ain't nobody else, and that's a problem.