PORTRUSH, Northern Ireland (AP) — Sunlight streaked through a few low-hanging clouds when Padraig Harrington opened The Open Championship with a piercing 3-iron into the wind. Darkness began covering Royal Portrush nearly 16 hours later Thursday night when the final group trudged off the 18th green.

One of the longest days was also among the more fickle in the 165 years of this major.

Five players from five countries tied for the lead at 4-under 67, the biggest logjam in this championship since 1938. There was sun and there was rain, a wee breeze and big gusts, and The Open wasn't even three hours old.

The one predictable part Thursday: Scottie Scheffler right in the mix.

And what made the massive throng at Royal Portrush tolerate rounds that approached six hours was seeing their favorite son, Rory McIlroy, birdie the 17th to recover from a bad patch on the back nine and join the 31 players who broke par.

Former U.S. Open champion Matt Fitzpatrick of England handled the notorious “Calamity Corner” par-3 16th by chipping in for birdie. Harris English, the unflappable American whose longtime caddie couldn't get a travel visa for the UK because of prison time served 20 years ago, put his short-game coach on the bag and made seven birdies.

They were joined by Li Haotong of China, Christiaan Bezuidenhout of South Africa and Jacob Skov Olesen of Denmark.

One shot behind was Scheffler, the world’s No. 1 player who has not finished out of the top 10 in the last four months, a stretch that includes another major among three wins.

McIlroy made bogey on the opening hole with an entire country behind him — that was still three shots better than his start in 2019 — and overcame three bogeys in a four-hole stretch with a key birdie on No. 17 that allowed him to break par at 70.

“Certainly dealt with it better than I did six years ago,” said McIlroy, who hit only two fairways. “I was just happy to get off to a good start and get myself into the tournament.”

Scheffler only hit three fairways in his round of 68.

It's not that golf's best were necessary wild off the tee. There was that small matter of weather, often the greatest defense of links golf, which brought the occasional rain, the constant wind and rounds that nearly last six hours.

That's why Scheffler seemed perplexed about so much attention on his accuracy off the tee.

“You're the second guy that's mentioned that to me,” Scheffler said. "I actually thought I drove it pretty good. I don't know what you guys are seeing. When it's raining sideways, believe it or not (it's) not that easy to get the ball in the fairway.

“Really only had one swing I wasn't too happy with on the second hole,” he said. “But outside that, I felt like I hit a lot of good tee shots, hit the ball really solid, so definitely a good bit of confidence for the next couple of rounds.”

There also was his 4-iron to 3 feet on the 16th for birdie, the start of birdie-birdie-par finish.

But no one could go extremely low.

Olesen, The Amateur champion last year from Denmark, was the first player to get to 5 under until a bogey at the last. He was joined at 67 by Li Haotong of China, and then Fitzpatrick joined the group with his marvelous chip-in. Christiaan Bezuidenhout was the only player from the afternoon wave to join them at 67.

Fitzpatrick reached a low point in his game at THE PLAYERS Championship and appears to be back on track, particularly with what he called a well-rounded game in tough conditions on these links. He is coming off a tie for fourth last week in the Genesis Scottish Open.

The chip-in was his highlight, from well below the green to the right, into the cup on the fly.

“A bit of luck, obviously,” Fitzpatrick said. “Sometimes you need that. It just came out a little bit harder than I anticipated and on the perfect line.”

Li might have had the most impressive round, keeping bogeys off his card, by holing a 10-foot par putt on the final hole.

Another bogey-free round belonged to 44-year-old Justin Rose, in the group at 69 that included 52-year-old Lee Westwood, former Open champion Brian Harman and Lucas Glover, who was tied for the lead until a pair of bogeys early on the back nine.

English and Olesen were the only players to reach 5 under at any point.

“Was looking forward to coming to this week, and immediately after playing the course, I really liked it,” said English, who didn't qualify for The Open when it was at Portrush in 2019. “I loved how it frames the tee shots and you get to see a lot more trouble than you would on a normal links course.

For everyone, the hardest part was staying dressed for the occasion. There were sweaters and then rain suits, and some finished their round in short-sleeved shirts. This is what is meant by “mixed” conditions in the forecast.

Defending champion Xander Schauffele had a mixture of birdies and bogeys that added to an even-par 71. Shane Lowry, the last Open champion at Royal Portrush in 2019, had the nerves of someone hitting the opening tee shot. He handled that beautifully, along with most other shots in the worst of the weather in his round of 70.

And this might just be the start.

“We're going to get challenging conditions over the next few days,” Lowry said. “Today, for example, the 11th hole was like the worst hole to get the weather we got in. ... I think there’s going to be certain times in the tournament where that’s going to happen, and you just need to kind of put your head down and battle through it and see where it leaves you.”

Harrington, a two-time Open champion, had the honor of the opening tee shot for the 153rd edition of this championship. He made birdie. And then he shot 74.