The official cause of death for Miller Gardner has been revealed following a two-week investigation. Miller, the 14-year-old son of former New York Yankees player Brett Gardner, died in his sleep on March 21 while on vacation with his family in Costa Rica.

The New York Yankees played—and won—on Opening Day with heavy hearts after the death of former Yankees outfielder Brett Gardner's 14-year-old son Miller, who tragically passed away after falling ill on a family vacation in Costa Rica.