I'll begin with Australian golfer, Peter Thomson. He basically owned the British Open Championship in the latter 50's, winning the Open Championship in 1954, 1955, 1956, 1958 and then again in 1965. He went on to win on the US Senior Tour 9 times in 1985. He was inducted into the World Golf HoF back in 1988.
Then there's Hubert Green, who won the 1977 US Open, and then won the PGA Championship several years later in 1985.
Back in 1977 during his US Open run championship with Green well in contention, he was notified by local authorities prior to his final round on Sunday that a caller had phoned in to the host golf course and informed them that Green would be assassinated on the 15th hole. Under extra security, Green decided to finish the tournament, and ended up beating fellow competitor Lou Graham by a single stroke. He was inducted to the World Golf HoF back in 2007.
Green passed away (yesterday) Tuesday, June 19th, at the age of 71. Thomson passed away earlier today at the age of 88.