He played club level rugby union (RU) for Swansea RFC as a lock, and club level rugby league (RL) for Halifax as a second-row, and coached representative level rugby league (RL) for Wales, and at club level for Halifax, Leigh and Dewsbury.
Les Pearce was born in Swansea,[5] and he died aged 94.
Les Pearce was the coach in Halifax's 22-11 victory over Wakefield Trinity in the 1971–72 Player's No.6 Trophy Final during the 1971–72 season at Odsal Stadium, Bradford on Saturday 22 January 1972.
Les Pearce was the coach in Leigh's 5-0 victory over Widnes in the 1972 BBC2 Floodlit Trophy Final during the 1972-73 season at Central Park, Wigan on Tuesday 19 December 1972.
Les Pearce was the coach for Wales in the 1975 Rugby League World Cup.