Who was the only person to win a grand slam in golf?

Answer 1

Bobby Jones won what was known as the Grand Slam, US Open and Amateur, The Open and British Amateur Championships all in one year. But it was not the official Grand Slam which is all four mens professional majors in one year, as no player has ever won this.

Tiger Woods won the 2000 US Open, 2000 Open Championship, 2000 PGA Championship and 2001 Masters, this is known as the Tiger Slam, the only man to hold all four major titles at one time.