Tristan joined the Moseley for the start of the 2008-09 season plying his trade in National Division One. Despite playing at a league two levels higher than that of Cinderford, Tristan managed to play 22 games in all competitions, scoring 169 points, helping the Birmingham-based side to a mid-table position and also contributing 10 points against Leeds Carnegie at Twickenham to claim the 2009 EDF Energy National Trophy 23 - 18. Changes to the English league system saw National Division One be rebranded to the Championship for the 2009-10 season and with only 12 teams it was much more competitive with Moseley finishing 9th at the end of the regular season and being placed in the new format relegation group. Moseley survived the relegation group by finishing 2nd and Tristan had the best season of his career in scoring terms - being the top scorer in the league at the end of the regular season and finishing 3rd overall with 267 points from 26 games.
