At Aireborough Grammar School, Close excelled both academically and athletically. The school went unbeaten in the six cricketing summers while Close was there, and the school's sport's master arranged for him to receive coaching from George Hirst, a former England international who coached Yorkshire. Close dominated junior level cricket in the area; he joined Rawdon Cricket Club in 1942, when he was eleven years of age, and was almost immediately selected to play for both the under-18 side and the second team. Close was also proficient at football, and at the age of fourteen, he was signed as an amateur by Leeds United. A natural inside forward, he became the first Leeds player to feature as a youth international, when in October 1948 he played with England against Scotland at Pittodrie Park in Aberdeen.