What position did Christian McCaffrey primarily play?

Which college was Derrick Henry playing for when he entered the NFL? What jersey number did Derrick Henry wear with the Titans? What position did Saquon Barkley primarily play? Which college was Saquon Barkley playing for when he entered the NFL? Christian McCaffrey is best known for playing with which NFL team? Which college was Christian McCaffrey playing for when he entered the NFL? What jersey number did Christian McCaffrey wear with the 49ers? What position did Marshawn Lynch primarily play?