What position did Ezekiel Elliott primarily play?

What position did Shaun Alexander primarily play? Shaun Alexander is best known for playing with which NFL team? Which college was Shaun Alexander playing for when he entered the NFL? What jersey number did Shaun Alexander wear with the Seahawks? Ezekiel Elliott is best known for playing with which NFL team? Which college was Ezekiel Elliott playing for when he entered the NFL? What jersey number did Ezekiel Elliott wear with the Cowboys? Which college was Jerry Rice playing for when he entered the NFL?