In a historical golf event, Tiger Woods and Mickelson battled for £7million ($9m) in Las Vegas.
The two legends of golf could not be separated after 18 holes and it took until the fourth extra hole for Mickelson to finally get the better of his great rival.
Mickelson and Woods then headed back to the clubhouse where on the grass lay stacked the cash.
“I am just trying to calm down right now,” said Mickelson.
“My heart just cannot take much more but then this is such an incredible opportunity to have a day like this playing against Tiger.
“But then a day like today is not going to take anything away from him and his greatness as he’s the greatest of all time though to be able to have just a little bit of smack talk for the coming years means a lot to me as I really don’t have much on him (smiling).
“He also draws the big picture and the trump card but to have a day like today was just so special.
“Though I never thought we would go to extra holes as my heart just cannot take much more of it.”
As well as the cash, Mickelson was also handed a belt for winning the event.
Though it seems it was made for someone of Woods’ stature rather than Mickelson’s larger build.
Indeed, the belt would not go round the waist of Lefty and all were left feeling rather embarrassed.
Mickelson probably won’t care much about being left red-faced when he checks his bank account in the morning.
Both players had missed birdie opportunities before the match was decided in a dramatic manner on a makeshift hole of only 93-yards.
“Looking back on my putt on 17 in regulation, I just had to hole my birdie or the match was all over,” Woods said.
“Phil hit a perfect-looking birdie putt but then I did not want the match to end of that hole.
“So, I hit a good chip there on 17 that rolled in and we then went to extra holes.
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“Overall, it’s been a good day and we managed to raise a lot of money for charities that we are both involved such as stem-learning and also charities here in Vegas, so it means a lot to both Phil and myself.
“This event was made-for-TV. It was fun, competitive and at the end of day we had a lot of fun.”