Brett Gardner's 14-Year-Old Son Miller Died from Carbon Monoxide Poisoning

Miller Gardner, the 14-year-old son of former New York Yankees outfielder Brett Gardner, is believed to have died as a result of carbon monoxide poisoning.

According to the Associated Press (h/t ESPN), authorities in Costa Rica said tests showed Miller Gardner's body had a 64 percent saturation of carboxyhemoglobin, which is well beyond the lethal level of 50 percent.

Gardner died on March 21 at a hotel in Costa Rica while on vacation with his family.

Although the source of the carbon monoxide has yet to be confirmed, Judicial Investigation Agency Director Randall Zúñiga offered a potential explanation, saying: "It's important to note that adjacent to this room is a dedicated machine room, where it's believed there may be some type of contamination toward these rooms."

Brett Gardner and his wife, Jessica, released a statement through the Yankees on March 23, noting that Miller fell ill "along with several other family members," while on the trip:

Per the AP, part of the investigation into Miller's death focused on whether food poisoning may have played a role since multiple family members felt ill after dinner on the night of March 20 and received care from a hotel doctor.

Investigators also looked into the possibility of asphyxiation being the cause of death, but that was also ruled out before reaching the conclusion of carbon monoxide poisoning.

Brett Gardner, 41, spent his entire 14-year Major League Baseball career with the Yankees from 2008 to 2021 after they selected him in the third round of the 2005 MLB draft.

The one-time All-Star, Gold Glove Award winner and World Series champion hit .256 with 139 home runs, 578 RBI, 274 stolen bases, 943 runs scored and 73 triples in 1,688 career games.

Prior to the Yankees' Opening Day game against the Milwaukee Brewers last week, the team held a moment of silence in honor of Miller Gardner.