 Umaga scored one try in the 20-26 loss, which was the final game of the Zurich Premiership 2003/2004 season.Rotherham were relegated, without winning a single match in the campaign.In July 2004, Umaga signed with Coventry R.F.C., initially as the backs coach, becoming the assistant coach in September 2004 and the head coach in April 2005.