The 2002 Super League season proved to be a break-through year for him, as several injuries in the backs left the way open for him to establish himself in the first team.

Before the St. Helens Final Elimination clash, Aspinwall commented, "My goal at the beginning of the season was to get eight to ten games, maybe come off the bench, but because of the injury crisis that we've had, especially in the backs, I've found myself in the Semis now and one game away from a Grand Final.” Coach Stuart Raper played Aspinwall alongside several other up and coming youngsters during the 2002's Super League VII.

Aspinwall became a first team regular in the next two years, and played for Wigan at centre in the 2003 Super League Grand Final which was lost to Bradford Bulls.

He quickly signed for Super League rivals Huddersfield, where he played in the 2006 Challenge Cup Final defeat by St. Helens at Twickenham.

His 2007 season was cut short in July when he suffered an horrific cruciate knee injury against Warrington, ruling him potentially 12 months on the sidelines.