I would have. No QB since 1978 in the database I have (which admittedly is missing a few QB's) has ever had his first 16 games starting all with below average passer rating. That's how anomalous the situation is. I totally agree with KeyFin that it's better to have more prospects on the roster, but that prospect doesn't have to be Rosen. We would have been better off drafting someone else with a low round pick IMO if all you want is another low probability prospect.