New Details Revealed About Brett Gardner’s Son Miller's Final Days

Miller and his brother Hunter were raised in South Carolina.

Despite Brett Gardner spending his entire MLB career as a member of the New York Yankees, the outfielder and his wife Jessica Clendenin Gardner—who tied the knot in 2007—kept their sons Hunter and Miller largely out of the public eye in South Carolina.

Still, they occasionally stepped out in support of their dad’s career, attending the CCandy Children's Clothing Line Launch at MLB Fan Cave in New York

in 2013.

Miller was known to live "life to the fullest every single day.” 

In a statement announcing his tragic death, Miller’s family described the 14-year-old as having an “infectious smile” and someone who “lived life to the fullest every single day.”

He was similarly remembered by the New York Yankees in a March 2025 statement, who emphasized Miller’s “outgoing and feisty personality.”

Miller was following his father Brett’s footsteps.

Miller made an impact on the New York Yankees.  

In a March 2025 statement by the team confirming Miller’s death, the organization—for whom Brett played from 2008 to 2021—remembered the teen for the "spark in his eyes" as well as a "warm and loving nature.”

The team continued in their statement, "It wasn't just Brett who literally grew up in this organization for more than 17 years—so did his wife, Jessica, and their two boys."

The Gardner family is still looking for answers after Miller’s sudden death.

In a statement shared by Brett’s former team, the outfielder and his family shared that after Miller and others had fallen ill while on vacation, the 14-year-old passed "peacefully in his sleep the morning of Friday, March 21."

"Miller was a beloved son and brother,” they wrote, “and we cannot yet comprehend our life without his infectious smile."

And amid their grief, the Gardner family expressed how they are still trying to determine what happened. As they added in their statement, "We have so many questions and so few answers at this point."

Costa Rican officials release Miller's preliminary cause of death.

One day after Brett and Jessica announced the sudden passing of Miller, Costa Rican officials said the teenager likely died from suffocation after possibly ingesting a toxic substance.

“Preliminarily, apparently the manner of death would be by asphyxia after a possible intoxication after apparently ingesting some food,” an Organismo de Investigación Judicial spokesperson told NBC News in a statement translated from Spanish. “At the moment it is a death under investigation and is awaiting the results of the autopsy, as well as the analysis of the Toxicology Section, to determine the exact cause of death.”

U.S. Embassy in Costa Rica confirms why the Gardner family was in the country.

The day after Brett and Jessica revealed that Miller had died, the U.S. Embassy of Costa Rica told Inside Edition that the family was vacationing in the Central American country for spring break at the time of his death.

The Embassy also confirmed that it was in discussions with the Gardner family about transporting Miller’s body back to the U.S.