Brett Gardner's 14-year-old son died on March 21 after falling ill on a family vacation in Costa Rica. The cause of death has not been determined.

Less than a week after Yankees alum Brett Gardner’s son Miller Gardner, 14, died during a vacation in Costa Rica, his body was released to his family. The teen’s autopsy results are still pending.

Tests revealed that the room Miller Gardner, 14, the son of former New York Yankees outfielder Brett Gardner, stayed in while on vacation in Costa Rica had high levels of carbon monoxide, Rándall Zúñiga, the director of Costa Rica's Judicial Investigation Agency, OIJ, said in a statement posted to YouTube on Monday.