While a host of leading contenders struggled, the Englishman, who had been two-over par after seven holes, closed brilliantly to finish the day seven-under, four shots clear of Japan’s Hideki Matsuyama and American Brian Harman. Former champion Patrick Reed and 2012 U.S. Open winner Webb Simpson were among a pack of four golfers a further shot off the lead.
Rose, who withdrew from his last start a month ago with back spasms, kicked off his magical run at the par-five eighth where he made eagle after his approach shot from 275 yards bounced off a greenside slope and settled nine feet from the cup.
From there, Rose was locked in and birdied all but three of his remaining 10 holes in one of the most brilliant stretches of golf ever seen at the Masters.
“You can’t win the golf tournament today,” said Rose, who has held the first-round Masters lead four times. “Even with a 65 you can’t win it today. You can only probably lose it today, obviously.”
This Masters has a much more familiar look as it is back in its traditional April slot as the year’s first major while fans were welcomed back, although in limited numbers and with protocols in place to reduce the risk of COVID-19 transmission.
A wild finish left defending champion Dustin Johnson (74) nine shots back of the lead as he struggled with significantly fiercer conditions compared to the toothless Augusta National layout he triumphed on five months ago in record-setting style.
Johnson was one under when he reached the par-three 16th but made bogey after his tee shot rolled off the green and carded a double-bogey at the 18th after his tee shot sailed right.
Former champion Jordan Spieth, among the favourites and fresh off his win last week at the Texas Open, finished with a one-under-par 71 after a roller-coaster round that included a triple-bogey, bogey, three birdies and an eagle.
Spieth got into trouble at the par-four ninth when, after an errant drive, he tried to send his ball through a maze of trees but instead hit one of them and it ricocheted backwards leading to a seven.
The three-times major champion recovered with a birdie at 10 and then eagled the par-five 15th to salvage his round.
Bryson DeChambeau, whose bid to overpower Augusta National last November when he was the pre-tournament favourite failed, came into this year’s Masters riding high after his win at Bay Hill last month but again was left scratching his head.
DeChambeau’s day started to unravel at the par-three fourth where he made a double-bogey after he found a bush with his tee shot and then barely chopped it out. He added three more bogeys before a birdie at the 15th for a four-over-par 76.
World number two Justin Thomas, who finished fourth at November’s Masters and has heated up since, was expected to lean on his stellar iron play to get in the mix but instead bogeyed three of his first seven holes en route to a one-over-par 73.
Spanish world number three Jon Rahm (72), who is competing five days after his wife gave birth to their first child, mixed two birdies with two bogeys.
Rory McIlroy (76) made an inauspicious start to his latest bid to complete the career Grand Slam as he carded his worst opening round at the Masters and even hit his father with an errant shot that led to one his six bogeys.
The day began when a clearly moved Lee Elder, who in 1975 became the first Black man to compete in the Masters, was warmly welcomed as he joined Nicklaus and Gary Player as a new honorary starter for the 2021 tournament.
“I think it was one of the most emotional experiences that I have ever witnessed or been involved in,” said Elder, who has limited mobility and did not hit a tee shot.
Additional reporting by Reuters.