Most will remember the 1966 U.S. Open for Arnold Palmer's defeat, but Billy Casper did his part to earn the victory.

Billy Casper is finally getting the credit he deserves winning the 1966 U.S. Open at The Olympic Club.

4. 1966: Seven shots ahead of playing partner Billy Casper at the final turn, Arnold Palmer is caught and loses in an 18-hole playoff. 3: 1913: Francis Ouimet stuns the golf world.

Take a look at some answers to FAQs about the U.S. Open, which is being played this year at Oakmont Country Club.

The Olympic Club in San Francisco will be the center of the golf world as the first round of the U.S. Open gets underway.