The 33-year-old golfer from Bagdad Florida won a second extra hole play off to capture his first ever major title.
Watson and Oosthuizen
were both tied at 10 under par after 72 holes played. And the pair also shared a par four at the extra hole at the 18th.
But unfortunately going into the 10th both players hit shots into the trees just right of the fairway. And a magical second shot by Watson took the left hander to within 8 feet of the hole. And with Oosthuizen only able to manage a triple-bogey, it left the 33 year old with the luxury of two putts for victory.
It was a truly emotional occasion for everyone present. As Watson putted he was immediately embraced by his caddie and mother. The whole atmosphere had taken it's toll on the tearful American.
Prior to this victory Watson had only managed a runners up place in the 2010 PGA Championship
against the German Martin Kaymer.
This substantial victory will now put Watson 4th in the world rankings, and also makes him the eighth consecutive first time major winner.
Watson came from nowhere to birdie four in a row from the 13th that catapulted him to 10 under par and joint first with Oosthuizen.
England's Lee Westwood shot a 68 to tie third with the American golfer Phil Mickelson
(72), Matt Kuchar (69), and the Swede Peter Hanson (73) who was the overnight leader going into the final days play.
Lee Westwood spoke briefly about his roller-coaster week at Augusta by saying:
"The story of this week is that you've got to putt well to win the Masters and I haven't putted well"
Also Mickelson spoke about his lapse in concentration on the final days play after hitting a triple-bogey on the short par four. He said:
"That's where it went away and I don't know what I would have done differently"
Ian Poulter finished seventh on five under, whilst the runner up from last year Adam Scott (66) finished with four under. Which also included a hole in one at the 16th.
But the plaudits must go to the former University of Georgia
graduate Bubba Watson, who believe it or not as never taken a golfing lesson in his life. And for a man who only turned pro in 2003 this most definitely some achievement.
And like so many before him, Watson gracefully put on the famous green jacket like he'd been destined to do so.
And after the emotion of the final putt he was able to say these words:
"This is what everybody strives to do. No matter how much you want to live your life other ways, this is a honour, a special privilege, to put the green jacket on."
Bubba Watson will now be placed in the history books forever after this brilliant display of golf. And for a man who was born on Guy Fawkes Day, 5th November, he most definitely created some fireworks at Augusta.