What jersey number did Tony Dorsett wear with the Cowboys?

What jersey number did Eric Dickerson wear with the Rams? What position did Tony Dorsett primarily play? Tony Dorsett is best known for playing with which NFL team? Which college was Tony Dorsett playing for when he entered the NFL? What position did Earl Campbell primarily play? Which college was Earl Campbell playing for when he entered the NFL? What jersey number did Earl Campbell wear with the Oilers? What position did Gale Sayers primarily play?