Fox has lost a playoff to Scotland's Russell Knox at the Irish Open, missing an eight-foot putt to win the title and then having to watch on as Knox sunk two miraculous putts - the first to force a playoff, and the second to win it.
Kevin Na ended a near-seven year wait for his second PGA Tour victory thanks to a brilliant final round of 64 to win the Military tribute at The Greenbrier by five shots over 54-hole leader Kelly Kraft.
On a tense and magical afternoon at Ballyliffin, the 33-year-old Scot finally got his hands on the trophy following a finish of his own that was so spectacular, it deserves to sit right alongside McIlroy's prodigious efforts when it comes to any highlight reel.
He also climbed to a career-best 87th in the world rankings, topping the 95th place he had in February after his tied finish for third at the Maybank Championship in Malaysia.
They went back down the 18th hole for the playoff and Knox pitched from 120 metres to virtually the same spot on the green. "If I putt for four days at Carnoustie like I did today, I'd be happy".
"I was able to hit a good shot and get on the green, which I was thrilled with", Knox said of the putt.
Fox, who has not won on the European Tour, looked in control of the tournament when he moved two clear after birdies at the 12th and 13th before bogeying the 14th.
"I love the challenge of links golf".
Knox, who was on the 18th at the same time, hit a huge putt to put the pressure on the Kiwi.
"I can't tell what it is".
"We play it in the Dunhill [Links Championship] most years and it's nowhere near what it's going to be like for an Open so it is nice".
"For me to have made it twice in a row.I'm very lucky".
"There's a lot of bunkers I can carry, and thankfully driver has been working all week". 'Last year was a tough one for me, but I stuck with it, got my game back and now I can't believe I'm holding this. But well done to Russ.
"That's why you play golf, to hole a putt like that on the last hole".
"It's tough to describe how incredible this feels", Knox said after a closing 66.
"Tough to describe how wonderful this feels", he said.
"All the bad moments are taken care of with putts like that", Knox said.
"Making two of them from an nearly identical position is obviously a bit of a bonus". I mean, that's a bit of a bonus.
He started the day six shots off the lead and completing the biggest comeback in Irish Open history presents some redemption for a player who finished second in this event in 2016. He will now head to Carnoustie full of confidence and has thrown his hat in the ring for a place in Europe's Ryder Cup team.
Wade Ormsby and Adam Bland were Australia's best, both finishing 15 shots behind the victor for a tie of 49th.