On May 20, 2010 — The Braves score a 9th-inning touchdown to overtake the Reds, after trailing 8 – 0 earlier and being down by 6 when the fateful inning starts. After another good start by rookie Mike Leake, reliever Mike Lincoln gives up four consecutive singles to start the 9th, scoring two runs. He is replaced by Nick Masset, who walks Cody Ross to load the bases; Martin Prado follows with a apparent double play grounder, but 3B Miguel Cairo fails to get the ball out of his glove and the score is now 9 – 6. Arthur Rhodes strikes out Jason Heyward for the first out and Francisco Cordero comes out to face pinch-hitter Brooks Conrad. Conrad hits a drive to deep left field which deflects off the glove of Laynce Nix and falls in the stands for a walk-off grand slam. It is only the second time in major league history that a pinch-hit grand slam overcomes a three-run deficit to end a game; the first was on July 8, 1950, by Jack Phillips of the Pirates. Joey Votto also hit a grand slam earlier in the game for the Reds, and Craig Kimbrel earns his first big league win.

Source:
Baseball Reference May 20