Joyner played right-centre and scored a try in Castleford's 25-15 victory over Blackpool Borough in the 1976–77 Player's No.6 Trophy Final during the 1976–77 season at The Willows, Salford on Saturday 22 January 1977.
in the 1983–84 Yorkshire Cup Final during the 1983–84 season at Elland Road, Leeds on Saturday 15 October 1983, played stand-off in the 31-24 victory over Hull F.C.
Joyner played stand-off and was captain in Castleford's 15-14 victory over Hull Kingston Rovers in the 1985–86 Challenge Cup Final during the 1985–86 season at Wembley Stadium, London on Saturday 3 May 1986.
In addition to the above Test Matches, John Joyner played right-centre in Great Britain's 7-8 defeat by France in the friendly at Stadio Pier Luigi Penzo, Venice on Saturday 31 July 1982.
[11] He was the coach in Castleford's 33–2 victory over Wigan in the 1993–94 Regal Trophy Final during the 1993-94 season at Headingley, Leeds on Saturday 22 January 1994.