Lyon started his professional rugby league career with Widnes, joining the club from amateur side Wigan St Patricks in September 1983.
[6] Lyon played fullback (replaced by interchange/substitute Paul Darbyshire on 34-minutes) in Warrington's 24–16 victory over Oldham in the 1989 Lancashire Cup Final during the 1989–90 season at Knowsley Road, St. Helens on Saturday 14 October 1989.
He also played and scored a try in Warrington's 14–36 defeat by Wigan in the 1990 Challenge Cup Final at Wembley Stadium, London on Saturday 28 April 1990, in front of a crowd of 77,729.
[7] Lyon played fullback, and scored four conversions in Warrington's 12–2 victory over Bradford Northern in the 1990–91 Regal Trophy Final during the 1990–91 season at Headingley, Leeds on Saturday 12 January 1991.
[8] Lyon played fullback in St Helens' 10–4 victory over Wigan in the 1992–93 Premiership Final during the 1992–93 season at Old Trafford, Manchester on Sunday 16 May 1993.