Martin Kaymer still has a hold of the top spot on the 2014 U.S. Open leaderboard, but his grip isn't as tight.
Kaymer shot back-to-back five-under performances the first two days. On Day 3, though, he shot two-over, keeping his competition alive on Sunday.
Here are updated standings entering the fourth and final day of the U.S. Open:
For Kaymer to lose the U.S. Open, he'd need a meltdown of historic proportions. It wouldn't be the worst choke-job ever. In the 1966 U.S. Open, Arnold Palmer held a seven-shot lead on Day 4 and lost.
But a Kaymer collapse would be up there with the all-time collapses. According to the PGA Tour, he talked Saturday about the mental aspect of trying to keep such a huge lead:
Martin Kaymer: "The biggest challenge is not to get defensive. Then your game plan changes and you don't swing free." pic.twitter.com/My5B4MRgff— PGA TOUR (@PGATOUR) June 15, 2014
The favorites—Rory McIlroy, Adam Scott and Phil Mickelson—are all three-over or, in Mickelson's case, five-over. Bubba Watson also missed the cut.
The two golfers closest to being on Kaymer's tail are the only two who hit better than even on Saturday, Rickie Fowler and Eric Compton.
The 25-year-old Fowler hit for par on the first two days but improved to hit three-under on Saturday. ESPN Stats & Info tweeted that he had never hit better in a round at a major:
Rickie Fowler shot a 67 to match his best career round in any major #USOpen— ESPN Stats & Info (@ESPNStatsInfo) June 14, 2014
Fowler has had success in major tournaments, though. In just this year's Masters, he finished tied for fifth. And in the 2013 U.S. Open, he finished tied for 10th.
Seeing Fowling contend for a title is a surprise, but it isn't a shock. He's the 39th-best player in the world according to the PGA Tour official rankings. Seeing Compton contend for a title, though, is a shock, for multiple reasons.
Compton entered the tournament with just 250-1 odds to win according to Odds Shark. The 34-year-old has never won a PGA Tour event or made the cut in a PGA Tour major. But what makes Compton's rise not only more improbable, but the best story of the 2014 U.S. Open is the fact that he's had two heart transplants.
One couldn't tell that Compton has undergone life-threatening surgery by the way he's played this season, though. He finished tied for fifth in both the Arnold Palmer Invitational and the Zurich Classic of New Orleans.
If Compton climbs back from his two-over outing on Day 1 to catch Kaymer and win, it'll be one of the sports stories of the year.
David Daniels is a columnist at Bleacher Report. He tweets, too.