Complex sentence: Bains began his career as a Trainee with Coventry City where he had been since he was 11 years of age, but at the end of the 2005--06 season Bains was released by Coventry City after failing to make the first team squad.
Split into simpler sentences: Bains began his career as a trainee with Coventry City where he had been since he was 11 years of age. At the end of the 2005--06 season, Bains was released by Coventry after failing to make the first team squad.