Same as everyone else
Yes, an amateur would win the Claret Jug if he won the Open Champoinship. However, he would not win the prize money, as that would contavene his amateur status
no
No Amateur Golfer has ever won The Masters at Augusta National.
The first amateur to win a grand slam in tennis was Don Budge. He was an American from California, and won the event in 1938.
Many winners of the US Open have shot over par because the par is usually set at 70. Justin Rose won the 2013 US Open with +1, and before that, Webb Simpson won the 2012 US Open with +1. Not including the US Open, Zach Johnson won the 2007 Masters Tournament with +1.
Bobby Clampett didn't win much, he didn't win the US Open but his best finish was t3 in 1982.
Quarterfinalists in the Us Open Grand Slam tournament win about $237,500.
Bobby Jones won it four times as an amateur, and other amateur winners are Jerome Travers, Chick Evans, Johnny Goodman, and Francis Ouimet; there have been no amateur victories in the U.S. open since 1933.
He won his first one in 1991, then won in 92 and 93 as well.
You win it
The Country Club