What position did Fernando Valenzuela primarily play?

What position did Sandy Koufax primarily play? What uniform number did Sandy Koufax wear with the Dodgers? What position did Clayton Kershaw primarily play? What uniform number did Clayton Kershaw wear with the Dodgers? Fernando Valenzuela is best known for playing with which MLB team? What uniform number did Fernando Valenzuela wear with the Dodgers? What position did Hank Aaron primarily play? Hank Aaron is best known for playing with which MLB team?