Sonny Jurgensen and Fran Tarkenton were under 6 foot. Aaron Rodgers, Dak Prescott, Andy Dalton are all 6-2 or a little under. If you want to go by height Brock Osweiler should be the king of the castle he's 6ft 8. But he sucks. You have to look at performance and not height. There's really no difference in the amount of batted balls between Mayfield, Rosen or Darnold.