In August 2021, Ellerby agreed terms with UK EIHL side Sheffield Steelers for the 2021-22 season - following in the footsteps of Justin Hodgman who also moved to Sheffield from Ferencvarosi earlier in the summer.
Later in August 2021, Ellerby reached an agreement with UK EIHL club Sheffield Steelers for the upcoming 2021-22 campaign - echoing the move made by Justin Hodgman, who had previously relocated to Sheffield from Ferencvarosi during the summer months.