 On being made available for a free transfer by Brighton at the end of the 2005–06 season, Jarrett went on trial at Watford.After impressing in several pre-season friendlies, he was signed on a one-year deal in August 2006.Jarrett made one Premier League appearance for Watford, coming on as a substitute for Tommy Smith 71 minutes into a 1–0 defeat to Bolton Wanderers at the Reebok Stadium on 9 September 2006.