This concept needs to be looked at in positions besides QB. NFL has a philosophy of putting people in, making them go the distance, and burning them out in 3 years because they just get beat to hell. Football is a sport that just burns through people, the average career is less than 5 years. And they don’t make that much money. We all think of the Deion Sanders that have these outrageous $50 million contracts. Most of them won’t make a million dollars over their career, can’t get a decent job because everybody knows their college degrees are bogus jock-degrees, and they’re so beat up that anything physical is pretty much out.
They don’t generally make players go the distance, teams cycle players in and out constantly. That’s why there’s a 53 man roster to fill 22 starting positions. That’s one of the strengths of the hurry-up offense, makes it harder for the other team to sub players.