What position did Jack Ham primarily play?

What position did Ray Nitschke primarily play? Ray Nitschke is best known for playing with which NFL team? Which college was Ray Nitschke playing for when he entered the NFL? What jersey number did Ray Nitschke wear with the Packers? Jack Ham is best known for playing with which NFL team? Which college was Jack Ham playing for when he entered the NFL? What jersey number did Jack Ham wear with the Steelers? What position did Lester Hayes primarily play?