And,,number four it is!

1930

  On September 27, 1930 Bobby Jones completed the Grand Slam of golf, at that time the Grand Slam consisted of The U S Amateur, British Open, British Amateur and U S Open - a feat that as of now has not been repeated.
  Robert Tyre Jones was the most successful amateur ever to compete in Golf, an Attorney by profession he did spend most of his time on golf.
  Bobby Jones was one of the founders of The Masters in 1934, he retired from golf at age 28 because of poor health, but he did take a part in The Masters until 1948.
  One more thing he gave to the world of golf:  He joined with A G Spauldling Company to design the first set of matched clubs, something that is now very common.

At age 14

At the 1927 British Open

Bobby Jones grave - notice that it is a putting green, and the
'tokens' of appreciation placed by golfing fans.