The Cardinals were trailing the Royals 5-4 in the sixth inning, and then Rally Cat appeared.
After the appearance of the cat, catcher Yadier Molina went on to hit a go-ahead grand slam that gave St. Louis an 8-5 advantage at home.
The Cardinals then retired the Royals in order in the top of the seventh inning, and went on to win the game.
The Cardinals employee who picked up Rally Cat was bit, but it wasn't too bad.
The Cardinals are now just 1.5 games back of the Cubs for the NL Central lead.