[citation needed] Sarginson made his début for Harlequins (now London Broncos) and scored a try in the 70–0 victory over Gateshead Thunder in the Challenge Cup match at Gateshead International Stadium on Friday 6 May 2011, and made his Super League début for Harlequins and scored two tries in the 18–26 defeat by Salford City Reds at The Willows, Salford on Friday 1 July 2011.

[10] Sarginson's performances for the Wigan side earned him a nomination for Super League's Young Player of the Year for the 2014 season, but he would lose out to Daryl Clark of the Castleford Tigers.

[15] On 13 December 2017, the Gold Coast club agreed to release Sarginson who had made few appearances and faced a court case in his time in Australia.

[17] After starting in the first two matches of the season he missed the next two months with a recurrence of a shoulder injury which restricted his appearances whilst at the Gold Coast.

A try against the Castleford Tigers and a brace against St Helens followed as he found some of the form which helped the Wigan club lift the Super League trophy in 2016.

After a resounding victory over St Helens he received the news that his younger brother had died, as the Wigan club gathered around him, he decided to play just days later against Wakefield Trinity.