It was Daniel Berger who eventually emerged from a nine-car pileup atop the FedEx St. Jude Classic leaderboard on Sunday for his second consecutive win at TPC Southwind. At one point on Sunday afternoon, Berger was tied with eight others at 8 under, including Billy Horschel, Charl Schwartzel and amateur Braden Thornberry. 

Berger was flawless coming home, though, and the others were not. The now two-time winner shot a back nine 33 that included two birdies and no bogeys. But it wasn't so much that Berger closed like a boss as it was everyone else faded. Of the nine golfers who were at 8 under late in the afternoon, only Schwartzel and Whee Kim improved to 9 under. Everyone else fell back to 8 under or worse as Berger finished at 10 under. 

Berger joined Justin Thomas, Hidkei Matsuyama, Jon Rahm, Jordan Spieth, Cameron Smith and Si Woo Kim as winners on the PGA Tour this year under the age of 25.

Berger shot back-to-back 66s on the weekend after making the cut by just three strokes on Friday. His final 36 holes included 24 pars, 10 birdies and just two bogeys. Again, flawless.

"I'm extremely proud," he told CBS Sports' Amanda Balionis. "I'm one for one in defending titles so that's a pretty good stat. I just battled so hard today and played so good. I couldn't be happier. Golf is tough. There are ups and downs. I can't believe I've won again."

Berger joins David Toms (2003-04) and Dave Hill (1969-70) as the only back-to-back winners of this event, and he was a bit of an afterthought heading into the weekend. Berger rose 25 spots on Saturday and another eight on Sunday, finishing about an hour before the final pairing.

"I'm staying in the exact same hotel room with the exact same room number [as I was last year]," he said. "I thought, 'There's no chance this could be my week,' but apparently it was."

It certainly was. With that many golfers stacked up at the ending, it takes a strong finish and a lot of mental acuity to life a trophy. Berger showed both as five of his last six approach shots were 20 feet or closer to the pin. He didn't putt great, but as we've seen two weeks in a row now, you don't necessarily have to to win. Berger finished 44th in putting and No. 1 in strokes gained tee to green.

Now, he heads to the U.S. Open the same way he did last year: coming off a win. He finished T37 at Oakmont in 2016. It feels like this year could be a lot better.

Here are the rest of our grades for the St. Jude Classic

Adam Scott (T10): For a tournament he doesn't normally play, Scott was his usual impressive stuff off the tee and with his irons. Scott finished No. 1 in the field in strokes gained with his drive and No. 6 in approach shots. Unfortunately, he finished No. 67 in strokes gained with the putter and it pushed him four strokes out of first place. As I've noted on this site innumerable times, a great ball-striker can be average with his putter and still win, but he can't be that bad.  Grade: A-

Phil Mickelson (9th): It was a week of what could have been for Lefty. He made a double bogey or worse in each of his last three rounds and still finished within three of the final winning score. Mickelson now has a top-11 finish in each of the last five years here with no wins. He gained a lot of momentum next week for a Saturday money game at Torrey Pines while the U.S. Open is taking place. Grade: A

Rickie Fowler (MC): Not a great showing for somebody who is one of the 10 favorites to win next week at Erin Hills. Fowler struggled badly on the first day and couldn't quite get it all back in the second round. I'm not going to get super fired up about a single missed cut (especially one that included a double and a triple along with six birdies), but I do think this mildly changes the way I view Fowler's chances next week. He gets bumped from one of the five guys with the best chance to win to one of the 10-12. Grade: F