Having progressed through the
Bath Rugby academy and playing for the
University of Bath, Griffin made his senior debut for Bath against
Exeter Chiefs in the
Premiership Rugby Cup on 26 November 2022. In January 2024, he signed a new three-year contract with Bath. After returning to action before the end of that year, he sustained a shoulder injury during Bath's 24-20
European Rugby Champions Cup defeat against La Rochelle on 10 December 2024, that and caused him to undergo surgery. == International career ==