What position did Alvin Kamara primarily play?

What position did Frank Gore primarily play? Frank Gore is best known for playing with which NFL team? Which college was Frank Gore playing for when he entered the NFL? What jersey number did Frank Gore wear with the 49ers? Alvin Kamara is best known for playing with which NFL team? Which college was Alvin Kamara playing for when he entered the NFL? What jersey number did Alvin Kamara wear with the Saints? What position did Josh Jacobs primarily play?