His back ached. His focus lacked. The energy, Brooks Koepka said after just making the second cut at the Travelers Championship, just wasn’t there Saturday.

Finishing second, first and second in the year’s three major tournaments, it turns out, takes something out of you, even if you’re the No. 1 golfer in the world.

“I don’t think I’m even over the PGA,” Koepka said after a round of 2-over-par 72 left him 1-under for the tournament with one day to go.

“I found myself yawning on the golf course. I don’t think I’ve yawned on a golf course before.”

The PGA Championship is the one Koepka won, last month, for the second year in a row. He tied for second at the Masters and finished second last week in the U.S. Open after winning that tournament the previous two years.

“You’re playing so well, you’re mentally drained,” Koepka said. “Playing in a major, it happens to everybody. If you’re in contention, you’re going to be drained. If you’re not in contention, it’s a lot easier.”

Koepka said he wanted to keep his commitment to the tournament, so he came, for the fourth time.

Here on Saturday, Koepka bogeyed three holes in a row on the front nine but scraped back even through 12 holes.

Then came 13. His tee shot was in the front of the left-side bunker. His second shot hit the lip of the bunker, skipped once across the pond in front of the green and settled in the water. After the drop, his fourth shot cleared the pond but spun back in. He made double-bogey 7.

“I knew (the second shot) was going to be close. I thought, ‘perfect shot, it might get there,’ and then it just nicked the lip,” Koepka said.

“Ten (shots) back, what’s the point of laying up?”

A birdie on 15 and a bogey on 18 completed a round that just barely kept him here for Sunday.

The PGA Tour cuts down to the top 70 players plus ties, after two rounds, but it’ll make a second cut after the third round if more than 78 players make the first. Since 82 made it this week, the second cut was coming.

Some other notable names flirted with the line. Russell Knox, the 2016 champion here, was one. Francesco Molinari triple-bogeyed the seventh hole, putting his tee shot in one bunker and hitting from there to another, then three-putting.

They made it to Sunday, along with Koepka, who said he might take a day off from the gym.

“Everything’s aching,” he said. “I feel like an old man today.”

Champ stays alive

It won’t go down as one of Bubba Watson’s more memorable rounds at TPC River Highlands — but his final stroke will.

Watson chipped in for birdie on the 18th hole to finish off a round of 73 and stand at 2-under after 54 holes.

“Obviously, with the kids right there, you have to show off in front of them,” Watson said. “Somehow, I got it to go in. Today felt better energy-wise, I felt (a) better mindset. The score wasn’t there. My score doesn’t show how I felt I played.”

Had Watson failed to get up and down for par instead, a bogey would have dropped the defending champion into the made cut, did not finish category (see Koepka, above).

“It’s funny, Ted (Scott, Watson’s caddie) said, ‘Where are we playing next?’ That’s what golf is,” Watson said. “I’d love to shoot that Jim Furyk round (course-record 58). It has to be some heroic round I’ve never done (to have a chance to win Sunday).”

Keeping it dry

Saturday was the first full sunny day of the week at TPC River Highlands, and Bryson DeChambeau didn’t mind that at all. His 6-under 64 — six birdies — was as low as anyone went in the morning.

“To me I’ve only played well in dry conditions,” DeChambeau said. “I know I’ve said that before. Trying to figure out how to play better in wet conditions is a difficulty of mine.

“Today, it was a little bit drier out there, and I was able to control some things a lot better and didn’t make too many mistakes.”

DeChambeau, 25, is playing here for the fourth time and has crept up the leaderboard each year, from a tie for 47th in his debut to a tie for 26th to a tie for ninth last year.

Famed for his commitment to analytics, he said he has changed all kinds of things over the past year: club heads, shafts, his putter.

“People would call me crazy, but that’s just the way I am,” DeChambeau said. “I want to get better in every facet.”