At 20, Braves' Acuna becomes youngest to hit postseason slam
6:11pm PDT - October 7th, 2018 braves - USA TodayAtlanta Braves rookie Ronald Acuna Jr. passes Mickey Mantle to become youngest player to hit a grand slam in postseason
Atlanta Braves rookie Ronald Acuna Jr. passes Mickey Mantle to become youngest player to hit a grand slam in postseason