On April 13, 2012 – – The Cubs spoil the Cardinals’ home opener and P Adam Wainwright’s return to St. Louis with a 9 – 5 win. After the Cards receive their World Series rings before the game, Ian Stewarthits a three-run homer in the 1st, and Bryan LaHair adds his first career grand slam in the 3rd. Jeff Samardzija is the winner.

Source:
Baseball Reference April 13