Banned Collingwood defender Sam Murray has faced the AFL Anti-Doping Tribunal, just a year after testing positive to a ASADA match-day test.

Murray, 21, has served a 12-month provisional suspension and currently faces a four-year ban under current rules, but is hoping to serve a reduced sentence.

Members of the Anti-Doping Tribunal will consider Murray's plea over the next two weeks before releasing a statement on their findings.

Murray played 13 games for Collingwood last season before he tested positive in July and stood down two weeks later.