What position did Jorge Posada primarily play?

What uniform number did Andy Pettitte wear with the Yankees? What position did Bernie Williams primarily play? Bernie Williams is best known for playing with which MLB team? What uniform number did Bernie Williams wear with the Yankees? Jorge Posada is best known for playing with which MLB team? What uniform number did Jorge Posada wear with the Yankees? What position did Paul O'Neill primarily play? Paul O'Neill is best known for playing with which MLB team?