World Club Challenge final appearances
Roy Mathias played Left-wing, id est (that is) number 5 in Saint Helens" 2-25 defeat to the 1975 NSWRFL season premiers, Eastern Suburbs Roosters in the unofficial 1976 World Club Challenge at Sydney Cricket Ground on Tuesday 29 June 1976. Challenge Cup final appearances
Roy Mathias played Left-wing, id est (that is) number 5, in Saint Helens" 20-5 victory over Widnes in the 1976 Challenge Cup final during the 1975-1976 season at Wembley Stadium, London on Saturday 8 May 1976. County Cup Final appearances
Roy Mathias played as an Interchange/Substitute, id est (that is) number 15, (replacing prop Gary Bottell) in Saint Helens 0-16 defeat by Warrington in the 1982 Lancashire Cup final during the 1982-1983 season at Central Park, Wigan on Saturday 23 October 1982.
BBC2 Floodlit Trophy final appearances
Roy Mathias played Right-prop, id est (that is) number 10, and scored 2-tries in Saint Helens" 22-2 victory over Dewsbury in the 1975 BBC2 Floodlit Trophy final during the 1975-1976 season at Knowsley Road, Saint Helens on Tuesday 16 December 1975, and played Right-prop in the 7-13 defeat by Widnes in the 1978 BBC2 Floodlit Trophy final during the 1978-1979 season at Knowsley Road, Saint Helens on Tuesday 12 December 1978.
The record for the most tries in a BBC2 Floodlit Trophy final is 2-tries, and is jointly held by. Roy Mathias, Peter Glynn, Gerald Dunn, and Stuart Wright.
Roy Mathias is a Street Helens RLFC Hall of Fame inductee.