Simply finishing under par at the U.S. Open in Pinehurst, North Carolina was a feat during first-round play.
With most of the field already done for the day, Kevin Na and Graeme McDowell were clinging to a share of the lead with a pair of two-under-par 68s.
But then a late starter, Brooks Koepka surged ahead to take a one-stroke lead at three-under through seven holes.
An eagle on the friendly fifth hole got the job done. He's one to keep an eye on as play progresses to its conclusion on Thursday.
Here's a look at the updated leaderboard.
While Koepka holds the current lead, let's take a look at Na and McDowell's first-round play since those two held the lead most of the day, and may still finish as the leaders when the first round concludes.
Na and McDowell's Day
Beginning his day on the back nine, Na played steady. He parred holes 10-12 before notching a birdie on 13 to move one under par. He'd alternate bogey and birdie on the next two holes, and ultimately head into the front nine one under.
Holes one thru nine were a bit more challenging. He had two bogeys in this stretch, but saved his day with an eagle on the fifth hole.
The 30-year-old South Korean has just one win on the PGA Tour and has never finished higher than 10th in any major.
He'll be looking to maintain his high level of play over the next three days.
McDowell's path to 68 was somewhat similar. He too had an eagle on the fifth hole, but he was able to stabilize himself with a handful of saves and scrambles.
He parred all but three holes as he added a birdie on the 14th hole to offset a bogey on the fourth.
McDowell is looking to win his second U.S. Open. The 34-year-old from Northern Ireland won the tournament in 2010 when it was held at Pebble Beach in California.
Lefty opened with a respectable even-par 70 in the first round.
He began on the back nine and tallied birdies on two of the first five holes. Heading into the last nine holes, Mickelson was one under par.
He reached two under after a birdie on the fifth hole, but bogeys on the sixth and eighth holes stopped his momentum and forced him to settle for even on the day.
If Mickelson can win, he will have completed the career Grand Slam. The U.S. Open is the only major he's yet to win. Before Round 1 began, he talked about what that accomplishment would mean to him.
Heading into the tournament, McIlroy was the favorite, per VegasInsider.com. But it wasn't just Las Vegas oddsmakers calling the 25-year-old the man to beat. Colin Montgomerie, the 50-year-old Scottish veteran of the PGA and European Tour spoke about McIlroy before the tournament began.
Pinehurst is a ball strikers course and he [McIlroy] being the best ball striker in the world has to start as favorite.
Without Tiger [Woods] there, Rory McIlory is the favorite and you’d expect him to be right there.
Who can say he’s going to win because golf is one of these things. But Rory will be in contention. Definitely.
McIlroy didn't play like a favorite on Thursday.
Bogeys on the sixth and seventh holes put McIlroy two over early, and he scuffled through the rest of the day to simply get to one over.
He's only three strokes behind Na and McDowell, but he'll need to pick it up if he plans on winning.
The course is playing extremely tough, and huge jumps up the leaderboard don't appear to be all that realistic.