Barring a lone dropped shot on the back nine, Koepka had a near flawless round that included four birdies before the turn and a further three on his way back to the clubhouse to match Spain’s Rahm and Hovland of Norway.
The four-time major winner who is one of the poster boys of the ostracized LIV Golf League roster later posted a single-word tweet on his handle, “Nice.”
Fellow LIV man Phil Mickelson, a three time-winner at Augusta National Golf Club too brought in a sub-par score with a one-under 71 along with Dustin Johnson, Joaquin Niemann, Patrick Reed, all of them a shot behind Cameron Smith in tied 17th place on two-under 70.
Event icon Tiger Woods made a shaky start to his 25th Masters campaign to sit in a share of 63rd place on two-over 74, his round studded with three popular pars against five dropped shots, one of which came at the very end.
Two of Tiger’s five bogeys came from three-putts, a surprise for a golfer considered something of a marksman on the greens.
Meanwhile, debutant Korea Joohyung ‘Tom’ Kim hit an impressive 70 in the opening round of the year’s first major, his card marred by a double-bogey seven that had otherwise contained two birdies and an excellent eagled par-5.
The disaster struck on the par-5 15th hole, as Kim’s third shot from out of the greenside trap caught a slope on the green and rolled off into the water. He missed a 13-foot birdie chance on the closing hole to end his day on a strong note.
Kim was the leading Asian performer in a share of 17th place with Japan’s Hideki Matsuyama, the 2021 Masters champion hitting a 71 along with Sungjae Im of Korea, who has two top-10s in three Masters appearances.
Rahm started with a four-putt double bogey but the world number three fought back with seven birdies and an eagle to match his career low score at Augusta National.
“If you're going to make a double or four-putt or anything, it might as well be the first hole, 71 holes to make it up. After that, I was focused on the fact that all the strokes were good. I just got to work and I had 17 holes to make up,” said Rahm, who holds four career top-10s at the Masters.