With Dufner on the verge of winning his first major title Sunday at Oak Hill Country Club, Bradley decided it would be nice to be there in person to congratulate him.
Having finished his fourth round hours earlier, Bradley was headed out of town.
"I was on the way to the airport," said Bradley, who ended up tied for 19th. "We turned around, went through a red light. We were flying to be here.
"We have a connection for the rest of our lives because of that playoff. It's good to see him win this thing. He's just pure. He hits the ball so good."
Bradley made it in time to stand alongside the 18th green with Dufner's wife, Amanda, as Dufner put the finishing touches on his two-stroke win over Jim Furyk.
Two years ago at Atlanta Athletic Club, Dufner blew a five-shot lead on the back nine, making three straight bogeys while Bradley birdied two holes in a row to force a three-hole aggregate playoff. Bradley won it, and has had a spirited exchange with Dufner on Twitter since.
Dufner won his first two PGA Tour events last year, and both players were on the 2012 U.S. Ryder Cup team.
"I used to be able to give it to him because of the PGA," Bradley said. "But he gives it to me harder than anybody. I still got him in 2011, but he's a great player. ... He's a good guy, and he's good-hearted about a little ribbing that I will give him about that day.
"You know, the friendship with Duf is cool because we're going to have that forever, me and him in that playoff."
Now, Dufner has a Wanamaker Trophy of his own.