It was Na's second PGA Tour title but his first since 2011 and he was understandably emotional afterwards especially given how many times he had come close to winning since his breakthrough at the 2011 Justin Timberlake Shriners Hospitals for Children event in Las Vegas.
"Yeah, I was trying to hold it in," he said. "I mean, I had a beautiful, beautiful tee shot. I couldn't have asked for anything more. I got it just over the ridge. It was an easy putt, obviously, and all I needed to do was two-putt.
"It was nice to have a big cushion where I could enjoy the moment walking off the 18th hole, say hi to my loved ones on camera. It's just an incredible feeling right now.
"It's undescribable. The amount of close calls I've had and disappointments I've had, walking off the 18th hole in the locker room, on the drive back to the hotel.
"I mean, a lot of heartbreaks, but today everything was going well. Everything was going my way, and it was nice to have that big lead going up to the last hole and enjoying the moment. It was well worth it."
Kraft, a former US Amateur Champion, was chasing his first PGA Tour victory but although he matched his best previous finish on the PGA Tour he was unable to stay with the brilliance of Na.
Kraft received a good consolation prize in addition to the hefty second place cheque when he became one of the four players to earn at start at Carnoustie in ten days time being one of the four players not otherwise exempt to the Open Championship and finishing inside the top ten this week.
Brandt Snedeker, Jason Kokrak and Austin Cook were the others to do so.
Cameron Percy was the only Australian to make the cut this week and finished 56th.
The PGA Tour now moves to Silvis in Illinois for the John Deere Classic where Bryson DeChambeau defends his title.
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