In addition, the AL found itself at a competitive disadvantage compared with the National League during Cronin's term. With strong teams in larger markets and a host of new stadiums, the NL outdrew the AL for 33 consecutive years (1956–1988). In 1973, Cronin's final season as league president, the NL attracted 55 percent of total MLB attendance, 16.62 million vs. 13.38 million total fans, despite the opening of Royals Stadium in Kansas City and the American League's adoption of the designated hitter rule, which was designed to spark scoring and fan interest. While the National League held only an 8–7 edge in World Series play during the Cronin era, it dominated the Major League Baseball All-Star Game, going 15–3–1 in the 19 games played from 1959–1973.