On May 20, 1942, batterymates Mort and Walker Cooper played a pair of sibling heroes during a 1-0 victory over the Dodgers in Brooklyn. Mort outdueled Brooklyn's Whit Wyatt by allowing just two hits, while Wyatt allowed only four. One of those four hits was a triple off the bat of the Cardinals backstop Walker Cooper in the fifth. Moments later second baseman Creepy Crespi drove Walker in with a sac fly. The pitching duel was truly one for the ages, as Wyatt led the National League with 22 wins for the pennant winning Dodgers in 1941. Wyatt was on his way to a 19 win season in 1942, but that was not enough to lead the league in back-to-back years, as Mort Cooper took that title with 22 wins in an MVP performance, which helped snatch the flag out Brooklyn's grasp and bring World Series glory back to St. Louis.
The win snapped an eight game winning streak for the Dodgers, and helped set the table for a pennant race that will never be forgotten. The Cardinals went onto win 106 games that season, which was just two better the boys from Flatbush.
Check out the box score here: http://www.baseball-reference.com/boxes/BRO/BRO194205200.shtml