What position did Dak Prescott primarily play?

What position did Justin Herbert primarily play? Justin Herbert is best known for playing with which NFL team? Which college was Justin Herbert playing for when he entered the NFL? What jersey number did Justin Herbert wear with the Chargers? Dak Prescott is best known for playing with which NFL team? Which college was Dak Prescott playing for when he entered the NFL? What jersey number did Dak Prescott wear with the Cowboys? What position did Tony Romo primarily play?