ST. SIMONS ISLAND, Ga. — Billy Horschel thought he hit the winning putt, taking quick steps to the right to watch the ball track toward the cup only for it to burn the left edge.

No problem. He’d get another chance in the five-man playoff at the RSM Classic.

Except that he didn’t.

In a shocker Sunday at Sea Island, Horschel’s routine tap-in from 2 feet missed to the right on No. 18 and he was eliminated from the playoff. One hole later, with the other four players unable to make a putt in the dark on the 18th green, the final PGA Tour event was suspended until this morning.

Mackenzie Hughes, the 25-year-old Canadian trying to become the first rookie to go wire-to-wire in 20 years, had a 10-foot birdie putt on No. 18 on the second extra hole and it turned away to the left. It already was plenty dark, and there was no chance to play another hole.

Hughes, Blayne Barber, Camilo Villegas and Henrik Norlander were to return at 8 a.m. Monday to resume on the par-3 17th.

Horschel was headed home feeling empty.

“I missed it. That’s pretty much what it came down to,” Horschel said after walking off the 18th green. “I took my time and just blocked it.”

But he wrote on Twitter a few minutes later, “I didn’t take my time over that short putt.”

Either way, he was headed home to Florida feeling empty. He hasn’t won since the Tour Championship in 2014 to capture the FedEx Cup, and at No. 76 in the world, he is not yet eligible for any of the majors next year.

Australian Open

SYDNEY — Jordan Spieth sank a 10-foot birdie putt on the first playoff hole Sunday to beat local hopes Cameron Smith and Ashley Hall and capture his second Australian Open title.

Spieth, the former world No. 1, had to sink another clutch par putt on the 18th hole at Royal Sydney to join Smith and Hall at 12-under 276 after 72 holes, forcing a three-way playoff.

Four players held the lead at various times on a dramatic final day, including Spieth, who was playing the Australian Open for the third time. He also has a runner-up finish (2015) to go along with his two wins in 2014 and 2016.

Hall and Smith both shot 6-under rounds of 66 on Sunday to tie for second.

On the playoff hole — the 18th — Spieth put his approach to within 10 feet before Hall stepped up the pressure by knocking his to less than 8 feet.

The 23-year-old Spieth then showed the composure that won him the Masters and U.S. Open titles last year when he calmly sank his putt while Hall pushed his birdie attempt right of the cup.