O'Duffy also encouraged promising young Gaelic games players to join the police side in Dublin so they were eligible to play for Dublin GAA in county matches. When Dublin won the 1927 All-Ireland Senior Hurling Championship Final at Croke Park against Cork GAA, they had fourteen Garda members on their team, a record for the number of county players from the same club. Membership was originally only open to serving members of the Garda but this restriction was later removed.
O'Duffy also encouraged gifted young Gaelic games participants to join the police side in Dublin so they could compete in county matches for Dublin GAA. Upon winning the 1927 All-Ireland Senior Hurling Championship Final at Croke Park against Cork GAA, Dublin's team featured fourteen Garda members, a record for the number of county players from the same club. Initially, membership was restricted to serving Garda officers but this limitation was later abolished.