What position did Eddie Mathews primarily play?

Which player was nicknamed "Double X"? What position did Mel Ott primarily play? Mel Ott is best known for playing with which MLB team? What uniform number did Mel Ott wear with the Giants? Eddie Mathews is best known for playing with which MLB team? What uniform number did Eddie Mathews wear with the Braves? What position did Rogers Hornsby primarily play? Rogers Hornsby is best known for playing with which MLB team?