I feel that to play the QB position in the NFL with a broken rib, punctured lung, herniated disk, etc. you have to be both physically and mentally tough at the same time.
No way to seperate the two and play that postion injured.
Unlike other positions, the QB not only has to endure the pain while playing, he also has to call plays in the huddle, read defenses, make decisions on the fly, .. and continue to show leadership.
Also unlike other positions, when playing injured he can never take a play off.
Anyone can say what they want about Romo, but he is one tough kid in every way on the football field.