Scrum-half Garside hails from the Norfolk coastline and previously represented Norwich School and Wymondham RFC, having also joined the Saints Academy set-up initially at Under-14s level before signing on with the Senior Academy ahead of the 2021/22 season.
The scrum-half made his debut in Black, Green and Gold in the Premiership Rugby Cup in 2022, marking the occasion with a sharply-taken try against Newcastle Falcons. Garside’s Premiership debut would come the following season as he came off the bench against Gloucester Rugby at the Gardens.