Career
Leslie was also on the books at Charlton Athletic but failed to make a first-team appearance. He additionally featured for Slough Town, Red Star Olympique in Paris, France, Guildford City and Born in Slough, Leslie began his career with Slough Town before making a move to Charlton Athletic in 1930.
He failed to break into the first-team, instead opting to move to France to ply his trade, featuring for Paris-based Red Star Olympique.
He returned to England in 1932, joining up with Football League club Walsall. Leslie would go on to make 88 Football League appearances for Walsall, scoring twice before drifting back into non-league football with Guildford City. manager Ted Davis signed him from Guildford for the newly-formed Southern League club in the summer of 1937.
Leslie made his debut for the U"s in their first-ever professional match on 28 August 1937 as Colchester fell to a 3–0 defeat to Yeovil & Petters United at the Huish. Leslie suffered from a string of injury problems while with Colchester as he was required to undergo a cartilage operation in May 1938, and suffered further setbacks in October 1938, requiring further fitness training at Highbury, London.
On his return to first-team action, Leslie was named club captain, having been voted as the best centre-half in the Southern League for the 1937-1938 campaign.
He was just behind Jack Hodge in becoming the first player for the club to reach 100 first-team appearances. Leslie ended his time with Colchester during the 1939-1940 season, when the league was abandoned due to the onset of World World War World War II He made his final appearance in a 0–0 draw against Ipswich Town Reserves on 2 September 1939, bringing his total appearances to 102 in all competitions. Following the war, Leslie assisted fellow former player Cecil Allan in running the Colchester Casuals junior side.
Leslie died in Colchester at the age of 79 on 22 November 1986.