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 entered the NBL scene in 1986 with the Waikato Pistons before joining the Canterbury Rams, capturing titles in 1989 and 1990. He returned to his hometown of Dunedin, where his 1991 debut for the Otago Nuggets was recognized as one of the top moments in Otago sports history.