Carbon monoxide poisoning is reportedly what caused the death of Miller Gardner, the teenage son of retired New York Yankees outfielder Brett Gardner.

Authorities in Costa Rica investigating the death of former New York Yankees outfielder Brett Gardner’s teenage son have concluded that he died of carbon monoxide poisoning. Miller Gardner, 14, was found dead on March 21 in his hotel room at the Arenas Del Mar resort in Manuel Antonio,

"He was 14 years old and has left us far too soon after falling ill along with several other family members while on vacation," the couple announced via X.