Formed: 1895 Admitted to Football League: 1919
The most important day in West Ham's history came when they were not even playing. On 30 July 1966, England won their only World Cup thanks in no small part to West Ham's Holy Trinity: the four goals came from Geoff Hurst and Martin Peters, while captain Bobby Moore lifted the trophy. The day established West Ham as one of the jewels of English football, a status that has endured. They are arguably the most important club never to win the English league.