Original: The Cardinals began playing in the current Busch Stadium in 2006 , and were the first team since the Yankees in 1923 to win the World Series in their first season in a new ballpark ( the Yankees would repeat the feat in 2009 at the new Yankee Stadium ) .
Simplified: The Cardinals began play in the current Busch Stadium in 2006 , becoming the first team since 1923 to win the World Series in their first season in a new ballpark .