Clarke made his first grade debut for Manly in Round 22 of the 1993 season against Western Suburbs.
In 1995, Clarke joined Eastern Suburbs later renamed as the Sydney Roosters and enjoyed his best period in first grade.
In 1996, Clarke played 24 games for the club as they reached the finals for the first time in a number of years.
In 1998, Clarke joined the ill-fated Adelaide Rams and was a member of their last ever game a 34-20 loss against the Newcastle Knights.
After the liquidation of Adelaide, Clarke joined South Sydney and ironically was involved in their final ever match as a first grade side which was a 34-16 loss to Parramatta.