1966 Official US Open Golf Programme: 66th Open Championship 16-19 June played at The Olympic Club San Francisco. Billy Casper, the 1959 champion, staged one of the greatest comebacks in history by erasing a seven-stroke deficit on the final nine holes to tie Arnold Palmer; he then prevailed in an 18-hole playoff to win the second of his three major titles. It was the fourth playoff in five years at the US Open, and the third for Palmer, the 1960 champion - clean throughout