What position did Jerome Bettis primarily play?

What position did Edgerrin James primarily play? Edgerrin James is best known for playing with which NFL team? Which college was Edgerrin James playing for when he entered the NFL? What jersey number did Edgerrin James wear with the Colts? Jerome Bettis is best known for playing with which NFL team? 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?