What position did Roger Maris primarily play?

Which player was nicknamed "The Commerce Comet"? What position did Yogi Berra primarily play? Yogi Berra is best known for playing with which MLB team? What uniform number did Yogi Berra wear with the Yankees? Roger Maris is best known for playing with which MLB team? What uniform number did Roger Maris wear with the Yankees? What uniform number did Derek Jeter wear with the Yankees? What position did Mariano Rivera primarily play?