Day, Spieth and Watson will play together at Deutsche Bank Championship

McIlroy, No. 2-ranked Spieth and No. 3 Day will all be at TPC Boston for the Deutsche Bank Championship beginning Friday, the second leg of the PGA TOUR’s four-event FedExCup Playoffs.

And he still may.

For the first time in three years, Sean O’Hair, the adopted son of Delaware County on the PGA Tour, is not preparing to fight for his professional life in the Web.com playoffs.

Australian golfer Jason Day could mathematically overtake both McIlroy and Spieth in the world golf rankings at the second round of the four-event tournament next week. Two of the last three winners have won shooting 20-under par or better.

On Sunday, as he did at the RBC Canadian Open and the PGA Championship, Day was again firing on all cylinders. His three wins and the T-4 at the Open Championship came on courses where you had to be near 20 under to win. But even during his show-stopping performance at the Barclays, winning wasn’t a simple task for the now five-time PGA Tour victor.

Mine was one of those, and I’m thus, looking for a bounce back this week at the Deutsche Bank Championship.

It turned out to be Spieth, after he finished second to McIlroy’s 17th. Other past winners at TPC Boston teeing it up this week are Henrik Stenson (2013), Webb Simpson (2011), Rory McIlroy (2012), Charley Hoffman (2010), and Phil Mickelson (2007).

Vijay Singh captured the Barclays and the Deutsche Bank Championship in 2008, then coasted the rest of the way to the Cup by tying for 44th in the BMW Championship and tying for 22nd in the Tour Championship.

So it wouldn’t be a surprise to see him do well, even win. They value Day at $11,800, Spieth at $11,300 and McIlroy at $11,200. TPC Boston was originally designed by Arnold Palmer and overhauled by Brad Faxon and Gil Hanse a few years later.

That’s where Spieth will be looking to bounce back from a missed cut at The Barclays and resume his place atop the rankings and points race.

Earlier this year, McIlroy tightened his grip on the No. 1 spot by winning the Wells Fargo Championship and the WGC-Cadillac Match Play Championship, and he probably would have stayed on top had he not gotten hurt and Spieth not gotten hot.