The 29-year-old Spencer, sidelined by a back injury for five years, came up positive for Nandrolone after a random drugs test following Western Australia's Mercantile Mutual Cup One-day final against New South Wales in Sydney in February.
Spencer played six Limited-Over games for Western Australia last season.
He was born in England but moved to Australia as a five-year-old. He played two first class games for Kent in 1993 and four county games in 1994. He played for Western Australia in the same period until his back injury forced him out. He is the first Australian cricketer to fail a drugs test.
Nandrolone is an anabolic steroid used to boost muscles and to increase strength and power. It also speeds up recovery time after injury, allowing users to train harder.
Copyright AFP 2001
Australian paceman Spencer on steroid charge