PALM BEACH GARDENS, Fla. — Tiger Woods left early. Rory McIlroy faded late. And when a most unpredictable Honda Classic finally concluded with a four-man playoff, Russell Henley was as surprised as anyone to be holding the trophy.

His first comments after his second PGA Tour victory sized up a wild Sunday in south Florida.

“I don’t know what’s going on,” Henley said.

Russell Knox made a double bogey on the 14th hole. Henley made a double bogey on the 15th hole. McIlroy made a double bogey on the 16th hole. All three of them made it into the playoff with Ryan Palmer, whose 1-under 69 made him the only player from the last six groups who broke par. Palmer wasn’t without his problems. He couldn’t hit the green with a wedge on the par-5 18th hole and missed a 5-foot putt for par.

For the longest time, it looked like a tournament that no one wanted to win.

Henley won with one swing, though it took a second chance.

On the 18th hole in regulation, he pulled his 5-wood to the left, away from the water, and had about 40 yards to get up-and-down for birdie. He chunked his wedge halfway to the hole and then had to two-putt from 60 feet for a 72 just to get in the playoff.

His caddie, Adam Hayes, suggested he aim more to the right, and the ball narrowly cleared a bunker and settled 40 feet away. He two-putted for birdie, while McIlroy, Knox and Palmer all made par. Palmer missed a 10-foot birdie putt.