In the 1997 post season, Sampson was selected to play for Great Britain in the first match of the Super League Test series against Australia.
[4] Sampson won caps for England while at Castleford in the 1995 Rugby League World Cup against Fiji, South Africa (interchange/substitute), and Wales (interchange/substitute), and in 1999 against France (two occasions).
Sampson was a substitute (replacing Left-Prop Lee Crooks on 33-minutes) in Castleford's 12–28 defeat by Wigan in the 1992 Challenge Cup Final during the 1991–92 season at Wembley Stadium, London on Saturday 2 May 1992, in front of a crowd of 77,386.
Sampson appeared as a substitute (replacing Prop Martin Ketteridge on 74-minutes) 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.
[6] Sampson came back in 2003 when Castleford Tigers went through an injury crisis, scoring on his comeback game against Warrington Wolves.