What position did Lou Gehrig primarily play?

In what year was Walter Johnson inducted into the Baseball Hall of Fame? In what year was Lou Gehrig inducted into the Baseball Hall of Fame? What position did Babe Ruth primarily play? What uniform number did Babe Ruth wear with the Yankees? What uniform number did Lou Gehrig wear with the Yankees? What position did Joe DiMaggio primarily play? Joe DiMaggio is best known for playing with which MLB team? What uniform number did Joe DiMaggio wear with the Yankees?