What position did Philip Rivers primarily play?

What position did Ben Roethlisberger primarily play? Ben Roethlisberger is best known for playing with which NFL team? Which college was Ben Roethlisberger playing for when he entered the NFL? What jersey number did Ben Roethlisberger wear with the Steelers? Philip Rivers is best known for playing with which NFL team? Which college was Philip Rivers playing for when he entered the NFL? What jersey number did Philip Rivers wear with the Chargers? What position did Eli Manning primarily play?