Ali sits on stage as he is greeted by former NFL quarterback Warner during Celebrity Fight Night XVIII in Phoenix

 
Ali sits on stage as he is greeted by former NFL quarterback Warner during Celebrity Fight Night XVIII in Phoenix
Muhammad Ali (C) sits on stage next to his sister-in-law Marilyn Williams (L) as he is greeted by former NFL quarterback Kurt Warner during Celebrity Fight Night XVIII at the JW Marriott Desert Ridge Resort & Spa in Phoenix, Arizona March 24, 2012. REUTERS/Laura Segall (UNITED STATES - Tags: SPORT BOXING ENTERTAINMENT FOOTBALL)