On April 10, 2002, Eduardo Perez ended a three hour and thirty-one minute affair with a walk off blast that beat the Brewers 6-5 in eleven innings at Busch Stadium. The Brew Crew looked like they came to play, as they hammered Andy Benes through the first three innings and jumped out to a 5-0 lead. However, the Birds started pecking away in the bottom of the third by plating three runs. They scored another in the fourth, then tied it in the ninth to set the stage for the eleventh inning heroics.
Perez hit 79 home runs in his career. 25 of those came with the Birds on the Bat across his chest. The walk off in 2002 was the second game ending home run of his career. The first came in 1993 as a member of the California Angels. He hit one more in 2005 as a member of the Tampa Bay Devil Rays.
Check out the box score here: http://www.baseball-reference.com/boxes/SLN/SLN200204100.shtml