The win was the third for Johnson this season.
Casey was referring to the season-ending Tour Championship in two weeks, where the top five entering the 30-man tournament are assured of the overall FedEx Cup title with a victory.
Dustin Johnson joined elite company with his three-stroke victory over Paul Casey at the BMW Championship in IN on Sunday. Johnson dazzled at the Crooked Stick Golf Club over the weekend.
CARMEL, Ind. (AP) - Dustin Johnson walked down a corridor of fans, trying to touch the dozens of outstretched hands on both sides until he extended both arms into a massive wing span to accommodate as many as he could.
The BMW Championship might have been his most complete performance of what already has been a big year.
He led the field in driving. In addition, he was second in strokes gained putting.
There were the 30-yard gaps between his and Paul Casey's drives.
"We had a front row seat for something very special, and I'll get a front row seat for it tomorrow", Casey said. "I did everything I could".
"I enjoy being in the hunt and having to hit really good shots when you need to and I felt like the last few times I've been there I've hit some great golf shots to finish it off".
Once seen as a player who couldn't close, Johnson now has three huge wins on the PGA Tour this season: the U.S. Open, the WGC-Bridgestone Invitational and now the BMW Championship. Tiger Woods in 2007 was the last player to do that.
Casey, a 13-time European Tour victor who was runner-up to Rory McIlroy last week, won his only US PGA title at the 2009 Houston Open but was level with Johnson with 15 holes to play. Unfortunately, Johnson dropped his own eagle at the 15th right on top of him, essentially sealing the victory.
Castro, who went to Georgia Tech, is excited to go home with an opportunity to win a lot of money.
The Australian was leading the Vardon Trophy for the lowest adjusted scoring average going into the BMW Championship. Johnson smiled at the question.
"It's golf. It's just golf", DeChambeau said. "It's always a fair fight. Believe me - whether you want it to or not, it can".
"Winning the US Open was definitely a kick start", he continued. That lasted as long as it took Johnson to line up his 18-foot eagle putt and pour it in to restore his three-shot margin.
Johnson will tee off with Casey at 1:50 pm EST / 10:50 am PST.
Day went straight for treatment. They play together in the Pebble Beach Pro-Am.
"All the tools he has I believe are unmatched", Duval said. I have a lot of confidence in every part of my game. "Hopefully he be ready for Atlanta but the most important thing is the next 15 years, not the next 15 days".
"I've still got to go out and play some really good golf", Johnson said.
It seems no matter what play - magnificent or miserable - that Johnson makes on the course, he remains quiet and unassuming and, he says, that might just be his secret weapon. That's the goal for me. "So, I just try to stay focused".