Former NBA center Jason Collins, the league’s first openly gay player who serves as an ambassador, is undergoing treatment for a brain tumor, the NBA announced Thursday.

“NBA Ambassador and 13-year veteran Jason Collins is currently undergoing treatment for a brain tumor,” the league 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.”

The 7-foot-tall Collins played for the New Jersey/Brooklyn Nets, Memphis Grizzlies, Minnesota Timberwolves, Atlanta Hawks, Boston Celtics and Washington Wizards from 2001-14.

The Nets issued a statement wishing Collins well in his treatment.

“Sending our love and support to @jasoncollins98 and his family,” the Nets wrote in a post to

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