Born in Montreal, Quebec, Blachford played junior hockey for Montreal Mintos in 1898–99, before graduating to senior-level hockey the following season with Montreal Stirling, for which he played until 1902. He joined the Montreal Hockey Club's intermediate squad, and played one game with the Montreal HC senior team (also known as the "Little Men of Iron") in the regular season, and two games of Stanley Cup challenge play, helping to defeat the Winnipeg Victorias. He left Montreal HC with several other Montreal HC players in the off-season to join the new Montreal Wanderers for whom he played continuously until the end of the 1907–08 season. He was captain of the 1906 through 1908 squads.[1]
In the 1906 season, he was sidelined for most of the season with blood poisoning. In 1907 he was the victim of a blow to the head from Charlie Spittal of the Ottawa Hockey Club for which Spittal was convicted in criminal court. Blachford served as a coach for the Wanderers in 1906 and 1907 while he was recovering from his illnesses.[1] After the 1908 season, he retired, but returned for the 1909–10 season for the Wanderers in the new National Hockey Association, helping to win another Stanley Cup title before retiring for good.
Outside of the rover position, the more free-roaming position in the seven man game between defence and the forward line, Blachford also played as a winger. The March 21, 1908 issue of the Ottawa Citizen, in a review of the players on the Montreal Wanderers, listed Blachford as a right winger and claimed that the late defenceman Hod Stuart, a teammate of Blachford on the 1906–07 Wanderers prior to his death in June 1907, had rated him as the best winger in the ECAHA that season. The newspaper claimed that Blachford was "easily the most finished player on the forward line" on the Montreal team, and that he was "speedy, aggressive and a beautiful stick-handler."[3]