The 24-year-old center fielder was facing Braves starter Julio Teheran in the top of the frame. Starlin Castro doubled for the Marlins to leadoff the inning. Brian Anderson sent Castro to third on a single in the next at-bat. Derek Dietrich then drew a walk, before Miguel Rojas singled home Castro.
Then Brinson stepped up to the plate. Teheran threw an 83.6-mph slider to start the exchange. Brinson crushed his next pitch -- a 92.6-mph four-seam fastball -- very deep to left field. Braves outfielders made no movements for the ball, as they watched the grand slam fly into the second deck of the outfield seats. The long ball left the park at 113.2-mph, according to Statcast.
Brinson's bomb gave the Marlins a 6-0 lead. Miami led the contest 8-4 entering the eighth inning. Brinson was 1-for-4, with four RBIs and a run scored at that point in the game. Rojas was 2-for-2 with three RBIs for the Marlins.
MUST C: Lewis Brinson absolutely unloads on his first career GRAND SLAM! @Marlins up 6-0 on the Braves in the 4th. You can see all of the Marlins' action LIVE now on FOX Sports Florida and FOX Sports Go! #JuntosMiami #MLB #Crushed pic.twitter.com/4VNPN7Xy0J— FOX Sports Florida (@FOXSportsFL) May 20, 2018
Brinson is now hitting .162 on the season with six home runs and 17 RBIs in 43 games. He went 0-for-7 in the first and second game of the series against the Braves.