 Clark played well enough in 1946 to earn a tryout for the 1947 New York Yankees , and competed with Frank Colman for the final outfield position . He lost the battle and began the season in Newark . Over the course of the 1947 season in Newark , he had a batting average of .334 with 23 home runs and 86 RBIs . His efforts got him noticed by the Yankees , and he made his major league debut on August 5 . Within two weeks of being called up , Clark had a streak of six straight at @-@ bats with a hit . He finished the regular season with a .373 batting average in 24 games . He was named to the 1947 World Series roster , and played in three games . In game seven , he served as a pinch hitter for Yogi Berra , hitting a single , which helped the Yankees win the World Series ; he considered this one of his greatest moments in professional baseball . 
