Keeble was signed as an amateur for hometown club Colchester United by future West Ham United manager Ted Fenton in May 1947, a few weeks short of his 17th birthday. The club paid a £10 signing-on fee for his services.
In May 1947, Keeble was signed by Colchester United as an amateur, just weeks before turning 17. The club paid him a £10 fee to join their team.