His good friend Justin Thomas had it all the way.
Both Spieth and Daniel Berger had sent their tee-shots left from the 18th tee, but luck would be on Jordan's side as his hit a tree square on and bounced back in to the fairway.
"It's in the shadow", Spieth said. He even acknowledged he probably didn't deserve to be in a playoff given the breaks he caught on the back nine - the easy missed birdie putts; the tee shots that narrowly avoided getting wet. And I went nuts.
Spieth complimented Berger for the low-five as a "class act". What did Spieth do on this playoff hole?
No. 10 came Sunday. Gene Littler did it in 1959 and Tim Morris in 1982. Winning the Masters in 2015, and tying Tiger Wood's score of 270 (-18) for the weekend.
But, after Spieth had dropped a shot on the 14th and Berger made a birdie on the 15th, the pair were tied.
Spieth still led by two going to the back, but his advantage quickly evaporated over a final wild 90 minutes.
Charley Hoffman and Dan Lee tied for third at 10-under 270, two shots out of the playoff.
Spieth was comfortable in the bunker having hit from almost the same spot on the final hole of regulation.
In the playoff, Spieth's drive caught the top of an oak and bounced right into the middle of the fairway.
It's just Jordan doing Jordan things.
"That was one for the ages", said Spieth. Nathan Grube, the tournament's director want the fan experience to get even better. "I'm still upset about that one, but it created excitement in each playoff". He had rounds of 67, 73 and 70 earlier in the tournament.
Berger began the round in third place, three shots back.
"My ball staying up on 13, and then the one staying up on 15, that definitely if the rough weren't grown out the way it was this year, it would have been in the water". However, he recovered from a driver that had left him hitting off a downward slope near a pond to make par.
"It's incredible. It feels like we've been out here for a long time but it's only been four years", he said.
"I can take time off and hit the ball; that's not really the problem", Couples said. He took three steps and stopped in amazement.
"I thought it was going to miss to the right", he said. I didn't think 12 under would win today and it was hard enough to hold him to that'.
"The putter kind of let me down a little through the round but Michael (Greller, Spieth's caddie) kept me in it when I was losing it out there".