Bill Russell led the Boston Celtics to 11 NBA championships. The Celtics legend died Sunday at the age of 88, his family announced. "Bill Russell, the most prolific winner in American sports history, passed away peacefully today at age 88, with his wife Jeannine by his side, they wrote in a post on the legend's verified Twitter account. "Arrangements for his memorial … [Read more...] about NBA legend Bill Russell passes away at 88