He played club level rugby union (RU) for Bristol Rugby, and representative level rugby league (RL) for Wales and Other Nationalities, and at club level for Huddersfield, York and Hull Kingston Rovers, as a fullback, centre, or stand-off.
He played a further 92 games for York before moving to Hull Kingston Rovers in 1975.
[4] Wallace played stand-off in Hull Kingston Rovers' 11-15 defeat by Leeds in the 1975 Yorkshire Cup Final during the 1975–76 season at Headingley, Leeds on Saturday 15 November 1975.
Although born in England, Wallace was eligible to play for Wales through his Welsh grandparents.
[4] Wallace won a cap for Wales (RL) while at York in the 1975 Rugby League World Cup against France.