Bob Simpson was the granite-jawed, relentlessly competitive embodiment of Australian cricket at its most complete. Born Robert Baddeley Simpson on 3 February 1936 in the inner-Sydney suburb of Marrickville — the third son of Scottish immigrant parents who brought with them an ethic of toughness and tenacity — he was captaining school teams by the age of twelve and made his first-class debut for New South Wales against Victoria at sixteen. Over the next four decades, first as a player and then as a coach who rebuilt Australian cricket from its lowest ebb, he left a mark on the sport that few in the country's history could match.

As an opening batsman, Simpson was patience and precision made flesh. His 311 against England at Old Trafford in 1964 — his first Test century, cashed in from a platform of rock-solid defence — remained among the highest individual scores by an Australian in Test cricket for six decades. His first-wicket partnership of 382 with Bill Lawry against the West Indies in 1965 stood as an Australian record for generations. He was also an outstanding leg-spin bowler, taking 71 Test wickets, and was regarded by contemporaries as perhaps the finest slip fielder the game had ever seen, pouching 110 catches in 62 Tests and 384 in first-class cricket overall. In a career of 21,029 first-class runs and 60 centuries, the only criticism ever levelled was that he took too long to score his first Test hundred — it came in his 30th match.

In 1977, at the age of 41, he was asked to come out of retirement to captain a depleted Australia side while World Series Cricket stripped the team of its stars. He answered without hesitation. Then in 1986 he was appointed the country's first full-time national coach, working alongside Allan Border to restore discipline, fitness and fielding standards to a team that had lost its way. The results defined an era: Australia won the 1987 Cricket World Cup — their first — and regained the Ashes in 1989. The players who came through that period — Steve Waugh, David Boon, Mark Taylor, Merv Hughes — would go on to form the spine of the dominant Australian side of the 1990s. Simpson's coaching fingerprints were on all of it.

He was inducted into the Sport Australia Hall of Fame in 1985, the Australian Cricket Hall of Fame in 2006 and the ICC Cricket Hall of Fame in 2013, and was made an Officer of the Order of Australia in 2007. He died in Sydney on 16 August 2025, aged 89, at a private funeral attended by his former players, Steve Waugh and David Boon among them, and former Prime Minister John Howard.