Brooks Koepka's day at the Phoenix Open started with a tournament organizer pronouncing his last name "cupcake" on the first tee. Really, that's how it started. He was in the final group in a major PGA Tour event and the starter called him "cupcake."

It ended with a bogey-free 66 and the first PGA Tour win of his career.

"It feels amazing," said Koepka to CBS' David Feherty after his round. "I changed my putting stroke completely (at the end of 2014). Everything seems to be going right." 

It certainly was down the stretch on Sunday as Koepka burned the edge on so many holes for birdie that I lost count. He also canned a birdie at No. 13 and an eagle from off the green at No. 15 and took Hideki Matsuyama down by one stroke after Matsuyama failed to convert a birdie at the final hole.

"It was a fun day with Hideki and Martin," said Koepka. "I think me and Hideki will be battling it out for quite a while."

Speaking of the final hole, Koepka showed what his game is all about when he pulled driver on the long par 4 and pummeled his tee shot over the water about 330 yards when a 3-wood probably would have been sufficient. 

Here's a look at the beauty:

For Koepka, it was more a matter of when than if. He won the Turkish Airlines Open in Europe's version of the FedEx Cup playoffs last fall and knew he had the game to win early and often on this side of the Atlantic.

So you can now throw his name in a group of Americans under 25 -- including Jordan Spieth, Patrick Reed and Justin Thomas -- that will be competitive in any tournament they play in. 

They make Rickie Fowler look like an old man.

It's sort of fitting, too, that on a week in which Tiger Woods bowed out with a Friday 82, one of the United States' next big stars took the reins in a tournament that was up for grabs all week.

The shift isn't seismic but it's certainly underway.

Jordan Spieth: A

Spieth made a run at the top of the leaderboard with a 6-under 65 but started way too far back to end up at 15 under where Koepka did. He's still must-see every week thought.

Finish: T7

Bubba Watson: A

Watson was taking some hacks that I'm going to need to see a chiropractor for, but he couldn't find the cup with his putter. His misses on the green were bad misses -- pulls and pushes and strolls towards the cup moments after his ball left the putter face.

Still, he keeps proving that he's going to be a wicked out in every tournement he plays in this season.

Finish: T2

Tiger Woods: F

None of the 131 other golfers in this tournament finished behind Tiger Woods this week. He tied a club pro named Michael Hopper after shooting 73-82. If there was something below "F" I would give it to him. That's how bad he was.

Finish: MC

It was a wild week for Tiger Woods at the Phoenix Open. (Getty Images)
It was a wild week for Tiger Woods at the Phoenix Open. (Getty Images)

Phil Mickelson: F

Mickelson and Woods have now missed the cut in the same tournament twice (2012 Greenbrier). The more Mickelson says, "I got this," and the older he gets, the more he seems to, in fact, not have this.

Finish: MC

Golf without Tiger Woods: A

Nobody wants to hear it (OK, some people want to hear it), but golf without Tiger is still great. Maybe it doesn't touch the apex he took it to, but for a week in which Woods couldn't have been worse, the golf couldn't have been much better.

Your target audience changes, sure, but you're still hitting the bullseye if you get elite golf from the links of Hideki Matsuyama, Brooks Koepka, Bubba Watson and Jordan Spieth week in and week out.

Other notes

• Has anyone reading this ever tried a Medicus driver? Have they not made enough money to upgrade from Mark O'Meara?

• Freddie Jacobson is known as the "Swedish Houdini?" Who knows him as this? Who don't I know him as this?

• I'm always terrified Matsuyama's putts are going to run 20 feet past the hole. He takes his putter back farther than anyone I've ever seen.

• Walk-off.

Brooks Koepka has arrived. (Getty Images)
Brooks Koepka has arrived. (Getty Images)

For more golf news, rumors and analysis, follow @KylePorterCBS on Twitter and link up with CBS Sports Golf on Facebook and Google+.