Clarke was born in Camden, New South Wales to Rex and Eve Clarke and was the oldest of three children. At six months his family moved to the United States where Clarke would live until the age of 2 and a half. Clarke then moved to Mount Gambier, South Australia where his father would work as a vet. He was a talented junior footballer and basketballer, playing for the SA Country under 16s. In 1989-90 at 15 he would go on to play for the local semi-pro basketball team the Mount Gambier Pioneers in the South East Australian Basketball League. Clarke managed 15 games in two seasons for the Pioneers. Clarke played football for West Gambier in the Western Border Football League and quickly rose through the ranks to play 6 senior games in 1990 as a 16 year old. Clarke would be drafted by the Richmond Football Club at pick 56 overall in the 1990 AFL draft. He joined Mount Gambier local Nick Daffy at Richmond as the only South Australians in the 1990 draft due to the Adelaide Crows joining the AFL and having exclusivity to South Australians. Richmond avoided this rule as the two played in the WBFL which was as affiliated with the VCFL due to the Victorian teams in the league.
Playing career
Richmond career
In 1991 as a 17 year old Clarke spent the year playing for the Richmond Under 19s whilst studying science at Melbourne University. Richmond U19s won the first 11 games of the season but after a late season slump they were eliminated in the Semi Final. Clarke played 20 out of 23 possible games and finished runner up in the best and fairest to Duncan Kellaway. However Clarke was delisted by Richmond at the end of 1991 when the AFL u19s competition was abolished. Clarke was given another chance at AFL football and was picked up by the Brisbane Bears at pick 43 in the 1992 AFL Pre-Season Draft
Brisbane Bears/Lions career
In 1992 Clarke wanted a season in Adelaide despite being drafted by Brisbane. He played for South Adelaide Football Club in the SANFL whilst studying science at The University of Adelaide. After playing the first six games in the reserves Clarke would become a senior regular and finished 6th in the best and fairest. Debuting in 1993 with the Bears, "Doc" Clarke was a promising young Ruckman under coach Robert Walls and was particularly decisive with his tap work. After being runner up in the Brisbane Bears Club Champion award in 1994 and 1996, he took out the Merrett-Murraybest and fairest award in 1997 for the Brisbane Lions and consolidated his position as one of the league's best ruckmen.
Adelaide career
Clarke moved to the Crows in 2000. In 2005 in the absence of suddenly emerged number one ruckman Ben Hudson, Clarke was surprisingly recalled from the South Adelaide side in the South Australian National Football League to play a part in the Crows' run to the finals. He showed he was still an effective player, being labelled as one of the most effective "tap ruckmen" by commentator Robert Walls. He played on during 2006, with 18 games, and after ruckman Rhett Biglands had an anterior cruciate ligament injury in the Crows' last game of 2006, there was talk that Clarke may continue for another season. However, he retired from football at the end of the 2006 season after an AFL career of 248 games over 13 seasons.
Return to football – St Kilda
There had been some speculation in December 2006 that Clarke may be drafted by St Kilda Football Club for the 2007 season, and although this was initially denied, on 12 December 2006, he was taken by the Saints with their selection in the 2007 Pre Season Draft. Clarke signed on with the club for one season only, but trained strongly over the pre season and was selected for the first game. He performed strongly as the side's primary ruckman, displaying his usual ruckwork dexterity. In September 2007, Clarke announced his retirement.
Coaching career
After retiring from playing, Clarke rejoined Adelaide Football Club as a ruck coach, and later as a midfield development coach. On 23 May 2018, Clarke was announced as Adelaide's AFL Women's head coach from the 2019 season onwards. In his first season as coach, the Adelaide Crows won the 2019 AFLW Premiership.
Other
Clarke is a qualified veterinary scientist and is currently studying for an MBA. Clarke is married to Adelaide radio personality Ali Clarke. They have two children, Eloise Harper and Samuel Fletcher.
