US Open Fourth Round Live Updates, Leaderboard, Highlights

"I played some ugly golf the last two days, but my putter and short game kept me in it," Clark said. "Ultimately, it comes down to just believing good things are going to happen. (Scottie's) the best player in the world but today's my day."

Clark didn't know his dad, who came in on a red-eye flight from Denver, had arrived to the club until the family emerged for celebration on the 18th green.

Clark rolled the 52-footer up within a couple inches, then tapped it home to become the 10th player to with multiple U.S. Opens.

If there's a tie after 72 holes, it'll be a two-hole aggregate playoff. Still tied? They go to sudden death.

Clark snarled at his approach as it left his club, but his 9-iron from 193 yards found the green, 52 feet from the hole with two putts to win the tournament.

Clark's drive at 18 slides right, into the first cut of rough.

Clark left his birdie putt eight feet short on 17, then went two feet past for par and made bogey to fall to 4 under. He's one up on Burns and has gone birdie, birdie, bogey on 18 through three rounds.

Clark drives the green on the par-3 17th. He's 69 feet from the hole.

"Typifies the entire weekend," says NBC's Dan Hicks.

Horrendous lie after drive begats excellent shot into fairway and approach onto green for a look, albeit a 24-foot one, at birdie.

Tom Kim birdied 16 to get within two of Clark's lead.

That's how Jim "Bones" Mackay described Clark's lie after his drive at 16.

Clark left his 19-footer short by two feet on 15, then tapped in for par. A moment later, Burns dropped to his knees when his birdie try at 18 slipped past.

But it's not over. Clark followed with a drive into the fescue at 16.

Clark and Burns are on the greens at 15 and 18. Clark is 19 feet away, Burns has about 16 feet to tie.

Clark skimmed the edge on a 33-footer for birdie at 14 while Burns didn't get enough of his 10-foot try at 17 that could have tied it. Meanwhile, Scheffler three-putted for bogey and is four back.

Ten feet from a tying birdie at 17.

Tough luck on the 13th green for Clark and Scheffler. Clark's approach hit in the middle and rolled off, ultimately leaving him with a bogey—dropping his edge to two for the moment. Scheffler had a 20-footer for birdie that skimmed the edge.

Moments later at 16, Burns rolls in from 17 feet to get back within a shot.

Cowan and Koivun are both 21 years old.

Clark taps in for par at 12. Three holes ahead, Burns three-putts for bogey at 15. And all of a sudden, Clark's lead sneaks back to three with six holes to play.

Near-misses for birdie for Burns at 14, and for Scheffler and Clark at 11. Everybody pars. Clark's edge stays at two over Burns and four over Scheffler.

A stellar 60-yard approach shot at No. 10 yields a four-footer for birdie for Clark, bumping the lead back to two.

He's 7 under on the back nine for the week.

Six pars and three bogeys on Clark's front half after a terrific up-and-down par save at the ninth. He makes the turn up one.

Harry Higgs makes golf more fun.

"All of a sudden," NBC's Dan Hicks said, "those things that were going Clark's way for the first three days, not exactly."

Sam Burns bogeys the ninth hole. Clark saves par at the sixth.

Joaquin Niemann's got jokes.

Clark has played five holes, dropped two shots to par, and has seen a six-stroke lead shrink to one.

Sam Burns is draining them from everywhere on the front nine.

Emiliano Grillo was nine shots behind Clark after one round. He's closer now.

Another hole. Another 15-foot par save for the leader.

Clark is battling elements.

Nothing like a little chaos.

Sam Burns led last year's event after 36 and 54 holes, but finished tied for seventh after a final-round 78. This year, he's attacking from the opposite direction.

Clark's up-and-down play from Saturday, which ended with him shooting 70, is continuing Sunday. He missed the green, chipped over, and two-putted for a bogey at No. 2 that trimmed his lead.

The veteran of the New York Daily News and ESPN reminds that big U.S. Open leads aren't immune to drama, even late in the final round.

First exchange goes to Clark at No. 1.

Not exactly the stat Greg Norman wants to be reminded about.

We're not crying. You're crying.

The cup at the 18th is a celebration of Corey Pavin's U.S. Open win at Shinnecock in 1995, when his 4-wood from 228 yards on the 18th landed within a few feet and locked up a win.

The day's first charge belongs to Sam Burns.