What position did Mike Webster primarily play?

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