Donald MacKenzie joined the Argonaut Rowing Club of Toronto in the 1890s and spent well over a decade competing for them on the national and international scenes. One of his earliest successes came in 1899, when he came in third in the junior single sculls at the Championship Regatta of the Canadian Association of Amateur Oarsmen. By 1903 he had switched to the coxed eights and was a member of the winning crew at Canada’s Henley Royal Regatta. His success eventually led him to be selected for the 1904 Summer Olympics where, alongside Alan Bailey, Phil Boyd, Thomas Loudon, Pat Reiffenstein, Colonel Rice, George Strange, William Wadsworth, and Joe Wright, Sr., he lost to the Vesper Boat Club of the United States in the final of the coxed eights. As there were only two teams in the event, however, Canada earned a silver medal. MacKenzie continued to row for the Argonauts after the Olympics and captured the coxless fours and eights titles at the 1905 edition of Canada’s Henley Royal Regatta.
DOB previously given 5 October 1879.