What jersey number did Jim Kelly wear with the Bills?

Which college was Steve Young playing for when he entered the NFL? What jersey number did Steve Young wear with the 49ers? What position did Jim Kelly primarily play? Which college was Jim Kelly playing for when he entered the NFL? What position did Warren Moon primarily play? Which college was Warren Moon playing for when he entered the NFL? What jersey number did Warren Moon wear with the Oilers? What position did Roger Staubach primarily play?