Rally Squirrel is the name given to an American gray squirrel (Sciurus carolinensis) which appeared on the field and ran across home plate at Busch Stadium during a 2011 National League Division Series (NLDS) Major League Baseball game between the Philadelphia Phillies and St. Louis Cardinals on October 5, 2011. The squirrel captured American media attention, and was adopted as an unofficial mascot by the Cardinals and the populace of St. Louis. The Cardinals would go on to win the 2011 World Series in dramatic fashion.