Hall of Fame center Bill Walton, a two-time national champion at UCLA and two-time NBA champion, died Monday after a prolonged battle with cancer. He was 71.

Walton, who overcame a stuttering problem to become a beloved broadcaster, was surrounded by family when he passed away.

“Bill Walton was truly one of a kind,” NBA commissioner Adam Silver said in a statement. “As a Hall of Fame player, he redefined the center position. His unique all-around skills made him a dominant force at UCLA and led to an NBA regular-season and Finals MVP, two NBA championships and a spot on the NBA’s 50th and 75th Anniversary Teams. Bill then translated his infectious enthusiasm and love for the game to broadcasting, where he delivered insightful and colorful commentary which entertained generations of basketball fans. But what I will remember most about him was his zest for life. He was a regular presence at league events — always upbeat, smiling ear to ear and looking to share his wisdom and warmth. I treasured our close friendship, envied his boundless energy and admired the time he took with every person he encountered.

“As a cherished member of the NBA family for 50 years, Bill will be deeply missed by all those who came to know and love him. My heartfelt condolences to Bill’s wife, Lori; his sons, Adam, Nate, Luke and Chris; and his many friends and colleagues.”

Walton was the No. 1 overall pick in the 1974 NBA Draft by the Portland Trail Blazers, whom he led to their only NBA championship in 1976-77. Named the league MVP in 1977-78 and the Sixth Man of the Year in 1985-86, he added a second ring as a member of the 1985-86 Boston Celtics.

Walton was inducted into the Naismith Memorial Basketball Hall of Fame in 1993.