Editor’s Note: The Sentinel sports staff is putting together a summer series looking at the legacies of the most influential African-American athletes in history. Today: Bill Russell.Bill Russell’s basketball legacy is easy to quantify. The Boston Celtics center was simply the greatest winner in the history of the sport.In fact, he was the greatest winner in the history of any sports.It seems like that is all he did.Russell led the University of San Francisco to back-to-back NCAA