[2] He represented the Nunawading Spectres and Melbourne Tigers in the Victorian Basketball Association as a junior, winning one Under 14 and two Under 20 state titles.
[4] After playing for the Melbourne Tigers in the pre-SEABL competition in 1979 and 1980, Stacker joined the Frankston Bears for the SEABL's inaugural season in 1981.
[15][16][17] In July 2010, Stacker was appointed head coach of the Australian Institute of Sport (AIS) men's basketball program.
[2] In February 2019, Stacker was appointed an assistant coach of the South East Melbourne Phoenix for their inaugural season in the NBL in 2019–20.
[19] Stacker was set to coach Australia at the 2013 Summer Universiade in Russia,[20] but he stepped down from the role for personal reasons.