What jersey number did Franco Harris wear with the Steelers?

What jersey number did Adrian Peterson wear with the Vikings? What position did Franco Harris primarily play? Franco Harris is best known for playing with which NFL team? Which college was Franco Harris playing for when he entered the NFL? What position did Curtis Martin primarily play? Curtis Martin is best known for playing with which NFL team? Which college was Curtis Martin playing for when he entered the NFL? What jersey number did Curtis Martin wear with the Jets?