Denham made his NBL debut in 1986 for the Waikato Pistons, later moving to play for the Canterbury Rams, winning championships in 1989 and 1990. He moved back to Dunedin, where his 1991 debut for the Otago Nuggets ranked number 121 in the Otago Daily Times 2011 list of greatest moments in Otago sport.
Denham made his NBL debut in 1986 for the Waikato Pistons, subsequently playing for the Canterbury Rams, winning championships in 1989 and 1990. He returned to Dunedin, where his 1991 debut for the Otago Nuggets ranked number 121 on the Otago Daily Times' 2011 list of greatest moments in Otago sports.