He was one of four Aberavon RFC players in the Welsh team that day, the others were Billy Mainwaring, Maxwell Lloyd Wiltshire and Paul James Wheeler.
He won caps for Wales (RL) while at Warrington in the 1975 Rugby League World Cup against England, Australia, and New Zealand.
[4] Wanbon played at prop in Warrington's 24-9 victory over Featherstone Rovers in the 1974 Challenge Cup Final during the 1973–74 season at Wembley Stadium, London on Saturday 11 May 1974, in front of a crowd of 77,400, and played at prop in the 7-14 defeat by Widnes in the 1975 Challenge Cup Final during the 1974–75 season at Wembley Stadium, London on Saturday 10 May 1975, in front of a crowd of 85,998.
Wanbon played at second-row in Warrington's 27-16 victory over Rochdale Hornets in the 1973–74 Player's No.6 Trophy Final during the 1973–74 season at Central Park, Wigan on Saturday 9 February 1974.
Wanbon played at second-row in Warrington's 4-0 victory over Featherstone Rovers in the 1973–74 Captain Morgan Trophy Final during the 1973–74 season at The Willows, Salford on Saturday 26 January 1974, in front of a crowd of 5,259.