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Join the roomCharles Colin Sinclair was an Australian boxer who competed in the 1924 Summer Olympics. In 1924 he was eliminated in the second round of the lightweight class after losing his fight to Alfred Genon.
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Not who you're looking for? Others named Colin Sinclair: Scottish minister and moderator · Australian politician (1876-1956) · Northern Mariana Islander tennis player · professional footballer (born 1952)