Which college was Derrick Henry playing for when he entered the NFL?

Which college was Jerome Bettis playing for when he entered the NFL? What jersey number did Jerome Bettis wear with the Steelers? What position did Derrick Henry primarily play? Derrick Henry is best known for playing with which NFL team? 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? What position did Christian McCaffrey primarily play?