September 12, Wilson sprained his ankle and would not play for the rest of the season. Mancuso rose to the occasion, ending the season with a .366 batting average during a hitters' year when the league average was above .300 for the first and only time. The Cardinals won the National League pennant but, eventually lost to Connie Mack's Philadelphia Athletics in the 1930 World Series. In 1931 Mancuso was once again the reserve catcher to Wilson, leading the league with a 54.3% caught stealing percentage as the Cardinals won their second consecutive National League pennant. The 1931 World Series was a rematch with the Athletics as the Cardinals were victorious in a seven-game series. Mancuso only had one plate appearance during the series as a late-inning pinch hitter. During the 1932 season, Wilson turned 32 years old and shared the catching duties with Mancuso who caught 82 games to Wilson's 75 and hit for a .284 average. Mancuso was traded to the New York Giants before the 1933 season where new manager Bill Terry was rebuilding the team after the resignation of longtime manager John McGraw. Terry wanted to build his team around speed, defense and pitching. He replaced the slow-footed Shanty Hogan and installed the agile Mancuso as the Giants' starting catcher. Terry allowed Mancuso to be in charge of the Giants' pitching staff that included; Carl Hubbell's sharp-breaking screwball, Hal Schumacher's diving sinker ball, Freddie Fitzsimmons' knuckleball and Roy Parmelee who threw a variety of different pitches. Under Mancuso's guidance, the Giants' pitching staff led the National League in earned run average as the team won their first pennant in nine years. Although Mancuso led National League catchers in errors and passed balls, he also led in games played, baserunners caught stealing, putouts and, finished second in assists and in range factor. The Giants went on to defeat the Washington Senators in the 1933 World Series. Terry credited Mancuso as a major factor in moving the Giants from sixth place in 1932 to World Series champions in 1933. In an Associated Press poll of sportswriters, Mancuso finished second to the Yankees' Bill Dickey as the majors league's all-star catcher based on his ability to handle pitchers so skillfully. Mancuso ranked sixth in voting for the 1933 National League Most Valuable Player Award. In 1934, the Giants finished in second place, two games behind the eventual world champion