What position did Bruce Matthews primarily play?

What position did Larry Allen primarily play? Larry Allen is best known for playing with which NFL team? Which college was Larry Allen playing for when he entered the NFL? What jersey number did Larry Allen wear with the Cowboys? Bruce Matthews is best known for playing with which NFL team? Which college was Bruce Matthews playing for when he entered the NFL? What jersey number did Bruce Matthews wear with the Oilers? What position did Ray Guy primarily play?