Justin Rose probably should have stayed in bed. The Englishman ended Day 2 at the Masters in the same place he began — atop the leaderboard — only to discover the objects in his mirror were suddenly a lot closer than they appeared.

“For sure,” Rose said, “I didn’t quite appreciate the scoring was going to be quite so good today.”

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Dustin Johnson watches his tee shot on the 18th tee during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Justin Rose probably should have stayed in bed. The Englishman ended Day 2 at the Masters in the same place he began — atop the leaderboard — only to discover the objects in his mirror were suddenly a lot closer than they appeared.

Si Woo Kim, of South Korea, watches his tee shot on the 14th hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Rose followed his opening-round 65 with an even-par 72 that let his rivals squeeze most of the air out of what had been a four-shot cushion. On Thursday, he was one of only three golfers to post a round in the 60s. Overcast skies Friday made the greens more receptive and by day’s end, there were more cards turned in with 60-something on them — 18 in all — than you’d see at the VFW hall on Bingo Night.

Justin Rose, of England, reacts after a bogey putt on the sixth hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

Zalatoris, who was plugging away on the Korn Ferry Tour about this time last year, birdied the final three holes for 68. He called his approach into the 18th his most satisfying swing of the round, “knowing that it would get me into the final group.”

Jordan Spieth watches his tee shot on the 14th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

He wasn’t the only one. Lurking another shot back at 139 were 2015 winner Jordan Spieth (68) and Marc Leishman (67). That, in turn, was one better than a six-pack of golfers at 140, including Thomas, Tony Finau (66) and most improbably perhaps, Si Woo Kim (69).

Jordan Spieth hits from the fifth fairway during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

“Not on the course,” Kim replied to laughter.

Justin Thomas hits from the fairway on the 13th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

“No, I don’t want to answer any more,” he replied. “Sorry.”

Si Woo Kim, of South Korea, reacts to a missed putt on the eighth hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

After his round, Rose was asked why so many first-round leaders — even the top players — struggle to string together great back-to-back rounds at Augusta.

Marc Leishman, of Australia, knocks the sand off his shoe after hitting out of a bunker on the second hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

Marc Leishman, of Australia, knocks the sand off his shoe after hitting out of a bunker on the second hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

For everyone else, maybe.

Dustin Johnson watches his tee shot on the 18th tee during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Dustin Johnson watches his tee shot on the 18th tee during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Rose followed his opening-round 65 with an even-par 72 that let his rivals squeeze most of the air out of what had been a four-shot cushion. On Thursday, he was one of only three golfers to post a round in the 60s. Overcast skies Friday made the greens more receptive and by day’s end, there were more cards turned in with 60-something on them — 18 in all — than you’d see at the VFW hall on Bingo Night.

“For as tough as this place has been playing,” said Justin Thomas, who shot 67, “I felt like it was as easy as it could have been ... a lot of my birdies have been pretty low stress or pretty easy.”

For all that, Rose’s 137 total at the midway point of the tournament was still good enough for a one-shot lead over Will Zalatoris and Brian Harman.

Si Woo Kim, of South Korea, watches his tee shot on the 14th hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Si Woo Kim, of South Korea, watches his tee shot on the 14th hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoCharlie Riedel)

Zalatoris, who was plugging away on the Korn Ferry Tour about this time last year, birdied the final three holes for 68. He called his approach into the 18th his most satisfying swing of the round, “knowing that it would get me into the final group.”

Harman, a left-hander who didn’t think he’d qualify as recently as last month, birdied the last two for 69.

“Whenever you look up on the leaderboard and see your name up there pretty high at Augusta, it’s hard not to get nervous,” Harman said. “I was nervous. But it was nice to settle down with a good birdie on 2, and I struck it well all day today.”

Justin Rose, of England, reacts after a bogey putt on the sixth hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

Justin Rose, of England, reacts after a bogey putt on the sixth hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

He wasn’t the only one. Lurking another shot back at 139 were 2015 winner Jordan Spieth (68) and Marc Leishman (67). That, in turn, was one better than a six-pack of golfers at 140, including Thomas, Tony Finau (66) and most improbably perhaps, Si Woo Kim (69).

Kim’s chip for birdie from just behind the green at No. 15 had too much steam and zoomed past the cup before nestling into the fringe on the front. His reaction was steamier still. Kim slammed the head of his putter into the turf and snapped it off.

“Did you ever do that before?” a reporter asked afterward.

Jordan Spieth watches his tee shot on the 14th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

Jordan Spieth watches his tee shot on the 14th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

“Not on the course,” Kim replied to laughter.

He finished that hole and the next three putting with his fairway metal, which prompted another abrupt exchange.

“Si Woo, do you have another putter?”

Jordan Spieth hits from the fifth fairway during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

Jordan Spieth hits from the fifth fairway during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

“No, I don’t want to answer any more,” he replied. “Sorry.”

While Rose made no apologies, he had plenty of regrets. He bogeyed No. 1, had a 67-foot birdie try at the par-3 sixth fail to climb a slope near the pin and almost all the way back down to his feet for a second bogey, added a third at No. 7, and was stuck at 4 under walking off the 12th.

But Rose regrouped, birdied Nos. 13, 14 and 16 to get back to even on the day. It might not have seem like much of an accomplishment compared to all those 60s. On the other hand, defending champion Dustin Johnson, four-time major winner Rory McIlroy, Lee Westwood and Patrick Cantlay were all headed for the exit after failing to hit the cut line at 147.

Justin Thomas hits from the fairway on the 13th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

Justin Thomas hits from the fairway on the 13th hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoDavid J. Phillip)

After his round, Rose was asked why so many first-round leaders — even the top players — struggle to string together great back-to-back rounds at Augusta.

“It’s hard. We haven’t quite figured out that dynamic. Otherwise,” he smiled ruefully, “we’d do a better job that second day.”

Si Woo Kim, of South Korea, reacts to a missed putt on the eighth hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

Si Woo Kim, of South Korea, reacts to a missed putt on the eighth hole during the first round of the Masters golf tournament on Thursday, April 8, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

Marc Leishman, of Australia, knocks the sand off his shoe after hitting out of a bunker on the second hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)

Marc Leishman, of Australia, knocks the sand off his shoe after hitting out of a bunker on the second hole during the second round of the Masters golf tournament on Friday, April 9, 2021, in Augusta, Ga. (AP PhotoMatt Slocum)