 A pacey and elusive runner, Maddock set several scoring records at London Welsh, and scored 170 tries during his career with the club.Maddock first played rugby at a competitive level when he was selected to play for the Christ College XV.After leaving college, he joined his home town club of Pontycymmer, but later moved to London, joining Welsh exile team, London Welsh at the start of the 1900/01 season.