Sponsored Content SportsEngine, a brand from NBC Sports Next is the leading provider of Sport Relationship Management (SRM) software, empowering athletes, parents, coaches, and sports organization administrators with tools and services to manage their organizations and sports lives. Read SportsEngine stories Former Heavyweight Champ Dies in a Plane Crash May 23, 2021 | 0 minutes, 26 seconds read On this day, in 1969 0n August 31, the eve of his 46th birthday, Rocky Marciano was a passenger in a small private plane that crashed and killed him. August 31, 1969 Sport: Boxing Trivia sports in this article Boxing tags in this article Fan On This Day SportsEngine