Johnson played for Wigan from the interchange bench in their 2001 Super League Grand Final loss to Bradford.

[6] Having won Super League VIII, Bradford played against 2003 NRL Premiers, the Penrith Panthers in the 2004 World Club Challenge.

[8] He made his final Super League appearance in September 2011 against former club Wigan, announcing his retirement shortly after the game.

Johnson was then selected in the Great Britain team to compete in the end of season 2004 Rugby League Tri-Nations tournament.

He missed a large part of the 2005's Super League X with shoulder and thumb injuries but was in sensational form on his return and gained selection for the Tri Nations tournament, scoring a hat-trick against New Zealand.