It wasn't such a good day for Tiger Woods. He was tied for 24th at the Farmers Insurance Open, missed the cut at the Genesis, finished 12th at the Honda Classic, tied for second at the Valspar Championship and tied for fifth at the Arnold Palmer Invitational. Two bogeys over the last three holes gave him a 70.
"Today it was a bit of a struggle through eight holes", Day said.
"I made it a little more handsy, kind of like how we used to putt when greens were so slow on public courses", Woods said.
There are gobs of storylines this week with stars and superstars all over the board, but I picked nine to focus in on as the PGA Tour's premiere event gets going on Thursday. He sank a seven-footer for par at 18 to win by two.
McIlroy, a four-time major victor, was part of the other feature group announced, being joined by Americans Jordan Spieth, a three-time major victor and reigning British Open champion, and Justin Thomas, who won last year's PGA Championship.
This was his 38th worldwide start since that win, and there were all manner of issues that cropped up.
The victory moves to Langer to the top of the Charles Schwab Cup standings. Back problems that have plagued him since the time he was a teenager caused him to withdraw from tournaments in consecutive weeks on the final day toward the end of 2016.
Tiger Woods was a non-factor, shooting 74 to finish 14 shots behind Day as he failed to make a birdie in the final round of a tournament for the first time since 2014. However, she finished 90 minutes before the tournament ended because groupings were not changed from the opening round.
Lindy Duncan birdied her last three holes for a 64 to finish one shot behind.
Since failing on what was his fourth shot at a career grand slam, McIlroy took time off to decompress and only resumed practising over the last 10 days.
Park was the LPGA Tour rookie of the year and shared the LPGA player of the year award with So Yeon Ryu last year. He played his final 16 holes on Sunday in 4 under after bogeying the second hole.
After starting a ideal Sunday with a two-shot advantage Day's lead dwindled to a single stroke with back-to-back bogeys at Nos.
The 30-year-old Australian - an OH resident who can be found courtside at Cavaliers games - fought through some wayward tee shots and self-doubt to shoot a 2-under 69 on Sunday.
Moynihan and Dunne then defeated France 2-0 at Centurion Club to secure the first prize of 100,000 euros each.