What position did Derrick Thomas primarily play?

What position did Bruce Smith primarily play? Bruce Smith is best known for playing with which NFL team? Which college was Bruce Smith playing for when he entered the NFL? What jersey number did Bruce Smith wear with the Bills? Derrick Thomas is best known for playing with which NFL team? Which college was Derrick Thomas playing for when he entered the NFL? What jersey number did Derrick Thomas wear with the Chiefs? What position did Junior Seau primarily play?