What position did Jim Kelly primarily play?

What position did Steve Young primarily play? Steve Young is best known for playing with which NFL team? Which college was Steve Young playing for when he entered the NFL? What jersey number did Steve Young wear with the 49ers? Which college was Jim Kelly playing for when he entered the NFL? What jersey number did Jim Kelly wear with the Bills? What position did Warren Moon primarily play? Which college was Warren Moon playing for when he entered the NFL?