By Mike McDaniel The 11-time champion passed away on Sunday at the age of 88. Celtics legend and 11-time NBA champion Bill Russell died on Sunday at the age of 88. His dominance with the Boston franchise, a stretch that included 11 titles in 13 years, is unparalleled in professional sports. For all of his accolades on the court, Russell will perhaps be remembered even more for his civil rights activism. His three-year stint as a player-coach for the Celtics made him the first Black coach in North American professional sports and the first to capture a championship. On Sunday afternoon, the Cel…