What position did Eric Dickerson primarily play?

What jersey number did Barry Sanders wear with the Lions? What position did Emmitt Smith primarily play? Which college was Emmitt Smith playing for when he entered the NFL? What jersey number did Emmitt Smith wear with the Cowboys? Eric Dickerson is best known for playing with which NFL team? Which college was Eric Dickerson playing for when he entered the NFL? What jersey number did Eric Dickerson wear with the Rams? What position did Tony Dorsett primarily play?