 In 1909 he won the All England Plate at Wimbledon, a competition and prize introduced for players who had lost in the first or second round of the singles.In July 1908 Powell won the singles and doubles title of the Scottish Championships.He participated in the 1908 Summer Olympics in London, where he captained Canada's tennis delegation and placed joint-ninth in the singles tournament and, alongside compatriot James Foulkes, joint-seventh in the doubles competition.