Ashurst is predominantly a second-row and signed for St. Helens from Wigan St Patrick's having previously played junior football for Chorley Panthers. Ashurst made his first-team début for St. Helens in a 38–12 win over Salford in round 5 of 2009's Super League XIV, where he came off the substitutes' bench. It turned out to be a break through year for the St Helens Academy product, with Ashurst making 20 appearances for the St Helens R.F.C. first team, 15 of which came off the substitutes bench. He scored one try in these games. In 2010, his first team opportunities were far from halted, in fact enhanced thanks to injuries, and Ashurst managed to find the line much more than in his début year.[5]
Ashurst played 27 games for Wakefield Trinity in the Super League XXVIII season as the club finished bottom of the table and were relegated to the RFL Championship which ended their 24-year stay in the top flight.
On 8 June 2024 he captained Wakefield to the RFL 1895 Cup at Wembley Stadium, defeating Sheffield 50-6.
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