With one out in the inning, pinch-hitter Charlie Blackmon hit a sharp grounder to Braves first baseman Freddie Freeman. Freeman fielded the ball and threw home, beating Culberson to the plate.
However, the third baseman dove to the right of the plate on a headfirst slide, evading Gattis' mitt and touching home plate with his left hand.
"I was hoping they didn't have enough evidence to overturn it," Braves manager Fredi Gonzalez said. "But coming back and seeing a different look at it, it was clear and convincing. That was a big run there."
Joe Morgan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.