What jersey number did Brian Urlacher wear with the Bears?

What jersey number did Troy Polamalu wear with the Steelers? What position did Brian Urlacher primarily play? Brian Urlacher is best known for playing with which NFL team? Which college was Brian Urlacher playing for when he entered the NFL? What position did Champ Bailey primarily play? Champ Bailey is best known for playing with which NFL team? Which college was Champ Bailey playing for when he entered the NFL? What jersey number did Champ Bailey wear with the Broncos?