 Hitting the ground running as a rookie is really, really hard in the NFL. Look, that's what makes C.J. Stroud's season so spectacular last year. That's what makes Justin Herbert's rookie season so sensational. You go back, man, you've got some of the best quarterbacks ever. John Elway was bad as a rookie. Peyton Manning had more interceptions than touchdowns as a rookie. Present day, Josh Allen.