On 19 March 2021, before the start of the delayed 2021 season, it was announced that Powell would leave Castleford Tigers at the end of the campaign, with early rumours linking him to Warrington Wolves, whose Head Coach Steve Price had also announced he would be leaving at the end of the 2021 campaign.
On March 19, 2021, prior to the start of the delayed 2021 season, Powell was informed that he would leave Castleford Tigers at the conclusion of the campaign. There were early rumors linking him to Warrington Wolves, whose Head Coach Steve Price also announced his departure at the end of the same year.