Spieth proceeded to hit his bunker shot to about two feet, made the putt and the duo headed back to the 18th tee.
It's the second time Spieth has won after leading a PGA Tour event wire-to-wire.
Spieth hit a similar shot to hole-out at the John Deere Classic in 2013.
Spieth signed a 10-year deal with Under Armour in 2015.
"He has that "It" factor. That was gutsy. The second [bunker shot] was destiny".
For golf fans complaining of a somewhat lackluster finish to the U.S. Open last week, the little old Travelers Championship more than made up for it on Sunday night outside Hartford.
To be honest, this win came harder than some may have thought, Holding a three-shot lead with eight to play, Spieth lost it all with a combination of mistakes and Berger's hot play. But with a bogey on the fourth and a string of seven straight pars, he was never able to pull away.
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Spieth opened his final round with two "regulation" birdies from close range. But after clipping his third to three feet, he missed the putt for birdie and did the same on the next green to slip back to 11 under.
Spieth was comfortable in the bunker having hit from almost the same spot on the final hole of regulation. Then he took the rake with him to the clubhouse.
Spieth's approach fell into bunker.
Berger had found three of his four birdies across the last five holes to pile the pressure on Spieth, who had dropped shots on the 12th and then the 14th thanks to putting mishaps.
"I felt more comfortable in the bunker than I did from four feet", Spieth said. "Normally he'd just kind of have his hands up or something, right?"
"And Jordan does Jordan things, so there's not really much you can say". What little conversation there was was straightforward. Even then, Spieth had to get up-and-down from the front-right trap at the 18th hole to force a playoff.
At Rogers, Arkansas, So Yeon Ryu became the LPGA Tour's first two-time victor this season, taking the Walmart NW Arkansas Championship with a tournament-record 18-under 195 total. Berger's ran off the green to the left.
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Kerr still found time to crack a joke on the stage afterward: "Well, we had very little talent, actually, it was mostly coaching". Signing Durant obviously meant that the Warriors were going all in on getting their revenge on the Cavaliers for 2016.
He did, the ball rolling into the center of the cup with the speed of a ideal putt.
Playoff competitor Daniel Berger walked across the green and exchanged low-fives with his good friend Spieth, as cheers reverberated in the natural amphitheater.
"Hit the tree, kick it out, 5-iron in", laughed Greller, who kept the rake, saying it would look good in his mancave.
"This is our chance to be on a global stage with a professional sports franchise basically and this is what CT does for professional sports and it's a pretty good story". His second shot landed in the bunker.
It happened for Woods.
"It's one of most surreal experiences I've ever been a part of", said Grube, who just completed his 13th year as tournament director.
"I jumped up and saw it (ball) coming right down on the pin", he said of his final shot. I don't think anybody will do what Tiger did for the game.
AT&T brings Fixed Wireless Internet to eight more rural locations
The investment to connect rural areas in the USA with fixed wireless Internet is part of its FCC Connect America Fund commitment. AT&T said it plans to serve over 400,000 locations by the end of 2017 and over 1.1 million by 2020.
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