Bill Russell, a Celtics legend and 11-time NBA champion, passed away "peacefully" on Sunday, his family said. He was 88 years old.

Bill Russell died on Sunday. He was an important part of the Boston Celtics' dynasty in the 1950s and 1960s.

He was the only NBA player to win 11 championships, and he was also the league's first black head coach. He was 88.

His family posted the news on social media, saying that Russell died with his wife, Jeannine, by his side. "Jeannine, Bill's wife, and all of his friends and family, thank you for praying for Bill."

"Perhaps you'll remember one or two of the golden moments he gave us, or his trademark laugh as he delighted in telling the real story of how those moments happened,

" the statement said. And we hope that each of us can find a new way to act or speak with Bill's unwavering, dignified, and always constructive commitment to principles.

That would be our beloved #6's last and most important win. " In a statement, NBA Commissioner Adam Silver called Russell "the greatest champion in the history of team sports."

Russell, who was 6 feet 10 inches tall, was the best centre in the NBA during the same time as Wilt Chamberlain, who is also in the Hall of Fame and played against Russell in eight playoff and championship games.

Russell blocked shots so well that he was named the NBA's Most Valuable Player five times and an All-Star 12 times over

the course of his 13-year career. Russell had 21,620 rebounds in his career, which is 22.5 per game and is second only to Chamberlain's career record.

He was also the season's rebounding leader four times. He had 51 rebounds in one game and 49 rebounds in two other games.

He also had at least 1,000 rebounds in 12 straight seasons.  The NBA didn't start keeping track of blocked shots until the 1973-1974 season,

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