Hard to say. If Roger and Troy played in this era they would have spent more time in concussion protocol than any other players in team history. For instance, Aikman would not have been allowed to play in Super Bowl 28. He was still having headaches and nausea from a concussion he suffered in the NFC title game.
When Staubach played it was even worse. Head injuries were dismissed. "Oh he's alright, he just got his bell rung". As soon as a player could stand up straight and count past two they let him play.