What position did Jim Otto primarily play?

What position did Mike Webster primarily play? Mike Webster is best known for playing with which NFL team? Which college was Mike Webster playing for when he entered the NFL? What jersey number did Mike Webster wear with the Steelers? Jim Otto is best known for playing with which NFL team? Which college was Jim Otto playing for when he entered the NFL? What jersey number did Jim Otto wear with the Raiders? What position did Larry Allen primarily play?