It kept Duval from a breakthrough victory after eight years of a career collapse that had dropped him off the golf map. Ricky Barnes, the third-round leader, shot 76 and finished in the three-way tie for second. “That was a test of patience,” Glover said. “We got the full value of the course.”

Mickelson and Duval had the crowds trying to lift them, but Glover seemed to find a pocket of peace on the course. At 29, he had one previous PGA Tour victory, and his best finish in six previous major championships was a tie for 20th at the 2007 Masters.

Another heartbreak

Battling the tournament he had come so close to winning four times, Mickelson mounted the most exciting fourth-round charge, with two perfect, booming shots, crafting an eagle on No. 13 to tie Glover for the lead at minus-4. But heartbreak struck again. Glover’s birdie on No. 16 earned him the lead for good.

What happened ahead of him, though, was Mickelson faltering with bogeys on Nos. 15 and 17. Duval’s charge included four straight birdies, but he missed the green with his tee shot on the par-3 No. 17 and bogeyed to squelch his chances. Barnes unraveled early in the day and the rest of pack near the lead found endless ways to complicate their rounds.

The contenders had so many issues that even Tiger Woods made a run with consecutive birdies and looked dangerous at minus-1 after 14 holes, but he bogeyed No. 15 to stall a potential charge. When he plunked his approach shot into the rough, he pushed his hat over his face. He finished even par with a final-round 69.

Mickelson, who started the day at minus-2, had two bogeys early but birdied No. 9 and made a great par save out of more rough on No. 10 to hang in contention at minus-1. He birdied No. 12 with a long putt and made his huge move on 13. Barnes’s swing came unglued as he hooked his drive left on No. 1 (which he bogeyed) and No. 2. Just as he contemplated that mess, the horn blew, calling play, and he left the course looking like a man emerging from a 10-car wreck.

That all set up the drama for the Open’s first regulation Monday finish in 26 years, thanks to apocalyptic weather that has doused Bethpage with rain by the inch. Clouds continued to threaten more rain on Monday, but the weather held and Glover finally took control of a tournament that once seemed like it would never end.