 In 1937, Mancuso was hitting for a .283 average at mid-season to earn his second berth as a reserve for the National League team in the 1937 All-Star Game. A few days after the All-Star Game, a foul tip broke the ring finger on Mancuso's right hand. Harry Danning replaced him and played well enough that, when Mancuso was healthy again, the two shared the catching duties for the rest of the season. The Giants clinched their second consecutive National League pennant and, once again faced the New York Yankees in the 1937 World Series. Mancuso started the first two World Series games but, when he went hitless, Danning took over as the Yankees went on to win the series in five games. Danning took over as the Giants' starting catcher for the 1938 season with Mancuso hitting a respectable .348 with a .411 on-base percentage in 52 games.
