"He drove the green on the par-three 16th hole across a pond and left a 20′-10" shot for birdie, which he drilled.
"Just get some rest tonight", Day said.
"I thought there was just a massive over-reaction to it", he added. "I probably could have gone 4-5 feet bye, but I couldn't hit it any better than I did and I was obviously fortunate for it to hit the pin and go in". He had eight birdies, including six straight on the back nine, one off than the course record.
On the Symetra Tour, Stephanie Meadow opened with a two-under 70 to trail Desiree Dubreuil and Meghan MacLaren by four in the Island Championship in MI where Leona Maguire was a late starter. "I've had a lot of good looks at it".
"You're anxious about in the back of your head is Michael going to go chest bump or side bump?" You definitely get more momentum when guys are playing well.
He had briefly tied the lead when he got to eight under after holing a 20-foot putt for his second birdie of the day at the second hole, but a late bogey left the four-time major victor three adrift of halfway leader Brian Harman.
McIlroy birdied four of the first six holes, his 11-foot birdie putt at the first his longest putt in the run, and ran off three birdies in a row starting at the 13th to signal his return to form after missing the cut at last week's US Open.
McIlroy hit 17 greens in regulation on Thursday. "You know, with going on attack mode, if you get a little too aggressive you can miss some greens in the wrong spots, it makes it very hard to get the ball up-and-down", Reed said Wednesday in his press conference. Twenty-two of them shot a 66 or better.
That has helped attract a 156-player field that includes five world's top 10 ranked golfers and all four reigning major championship winners: Brooks Koepka, who won his second straight U.S. Open last week; Spieth; Masters victor Patrick Reed; and PGA Championship victor Justin Thomas.
Thomas couldn't things started on Thursday and is way back with a 72.
"I have four weeks into Carnoustie and it's all about getting my head in the right place. I think it showed kind of coming in".
Day played his final nine holes well after roller coaster opening nine holes and although he has played this event sparingly over the years and not well when he has done his start was a good tonic after the disappointment of last week's US Open. That has helped attract a 156-player field that includes five of the world's top 10 ranked golfers and all four reigning major championship winners. When the Dallas, Texas, native took his 12:50 tee time, the stands were filled and the gallery following him was the largest group; rivaled by only the following threesome of PGA stars Rory McIlroy, Bubba Watson, and Justin Thomas. Then on the par five sixth hole, Spieth reminded everyone of the moment from one year ago.
"I had an injury", McIlroy said.