After passing his Higher School Certificate, Close seriously considered becoming a doctor; his headmaster at Aireborough believed that he could have been accepted into Cambridge or Oxford university, but he was not allowed to start university until he had completed two years of national service with the military. With the enforced break from his studies he chose to try a career as a professional sportsman; he signed a professional contract with Leeds United and having already played for the Yorkshire Colts in second eleven cricket, he joined them for winter coaching. The coaches encouraged Close to switch from bowling seam to being an off spinner.