What position did Troy Polamalu primarily play?

What position did Ed Reed primarily play? Ed Reed is best known for playing with which NFL team? Which college was Ed Reed playing for when he entered the NFL? What jersey number did Ed Reed wear with the Ravens? Which college was Troy Polamalu playing for when he entered the NFL? 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?