Career
He competed in the doubles event at the 1920 Summer Olympics. In the quarterfinal they were defeated in four sets by Max Decugis and Pierre Albarran. Blackbeard participated in the 1920 Wimbledon Championships playing in all three events (singles, doubles, mixed).
In the quarterfinal he lost in four sets to Chuck Garland.
With countryman George Dodd he also reached the quarterfinal of the doubles event in which Algernon Kingscote and Cecil Parke proved too strong. He was less successful in the mixed doubles, reaching the second round with Doctorate.K.Betty.
In May 1920 he reached the final of the doubles event at the World Hard Court Championships, played at the Stade Français in Paris. With his teammate Nicolae Mişu they were defeated in the final by the French pair André Gobert and William Laurentz in straight sets.
In 1926 Blackbeard reached the final of the singles event at the South African Championships which he lost in three straight sets to countryman Jack Condon.
