As his father had played over 50 games for South Melbourne, Morrison was eligible to be drafted by Sydney under the father–son rule.
Already in Brisbane playing for the Northern Eagles, he chose to go to the Lions and was picked up with the 44th selection of the 1999 AFL draft.
[1] A key position player, Morrison spent most of his career with the Brisbane Reserves, which competed in the Queensland State League (QSL) and he was a member of their 2001 premiership team.
[2] With the presence of key position players like Mal Michael, Jonathan Brown and Alastair Lynch in the side, his opportunities to play AFL were limited.
In the first five weeks he played as many games at Richmond as he had in four years with Brisbane but was selected just once more that season as his club went on to claim the wooden spoon.