Longtime NBA player Jason Collins is undergoing treatment for a brain tumor, his family announced on Thursday.

Collins, 46, played 13 seasons in the NBA, starting and ending his career with the Nets.

“NBA Ambassador and 13-year NBA veteran Jason Collins is currently undergoing treatment for a brain tumor,” the NBA said in a statement. “Jason and his family welcome your support and prayers and kindly ask for privacy as they dedicate their attention to Jason’s health and well-being.”

Jason Collins #98 of the Brooklyn Nets reacts to a foul call during the fourth quarter. The Nets defeated the Suns 108-95 in an NBA basketball game at the Barclay Center on March 17, 2014. Jason Collins playing in his final NBA season in 2014. Paul J. Bereswill

Collins came out as gay in 2013, becoming the first active athlete to do so.

“If I had my way, someone else would have already done this. Nobody has, which is why I’m raising my hand,” Collins said at the time.

Jason Collins and Brunson Green attend the This Is About Humanity Soiree on August 23, 2025 in Los Angeles, California.Jason Collins with longtime partner Brunson Green. Getty Images for This Is About Humanity

Collins got married to longtime partner Brunson Green in June.