On June 10, 1967, tied 2-2, with two on, and one out in the bottom of the eleventh at Busch Stadium in St. Louis, Roger Maris sent the crowd of more than 30,000 home happy with a walk off shot that led to a 5-2 win over the Los Angeles Dodgers. The bomb was the 264th of his career, as well as the third and final walk off of his career. The man who had broken Babe Ruth's home run record with 61 in '61, only hit nine home runs with the Birds on the Bat across his chest, however, he was a key contributor in winning the National League Pennant, then in the World Series. Maris hit .385, with a home run, and seven RBIs, as he helped the Cardinals win their second title of the decade. He played one more season with the Birds before calling it a career, and helped the club win the National League crown once again. One year to the day of the walk off shot, the Cardinals were tied 2-2 in Atlanta when Maris connected on a two run bomb in the third inning. The home run proved to be the difference maker as the Birds hung onto win 4-3. Maris finished his career with 275 big blasts.
Check out the box score here: http://www.baseball-reference.com/boxes/SLN/SLN196706100.shtml