Complex sentence: He is regarded as one of the greatest players of all time, is an official Legend of the Australian Football Hall of Fame, and immortalised his reputation in the game by taking the Mark of the Century in the 1970 Grand Final.
Split into simpler sentences: He is regarded as one of the Australian football's greatest-ever players and is an official Legend of the Australian Football Hall of Fame. He immortalized his reputation in the game by taking the Mark of the Century in the 1970 Grand Final.