“I literally cannot believe it,” an emotional Stephenson said moments after the victory. A late arrival to tournament golf, the 56-year-old dentist played baseball in college. He started playing competitive golf in his late 30s. “I’ve just worked so hard over time. I know all the guys I’m playing with every time I go out, and I respect and appreciate them. People ask me how you play tournament golf, and I say, ‘You go out and get your brains beat out for about 10 years.’ But I was too stubborn to quit. I can’t believe it all came together.”

It was Stephenson applying the beatings this time around. He grabbed the 36-hole lead after an impressive 2-under 69 in the second round, part of which was played in a quick-arriving storm that brought rain and 25-30 mph wind gusts. He played even-par golf during the squall, while most of the field took their lumps in the form of bogeys and double-bogeys. Stephenson, who finished fifth in the 2015 Texas Senior Amateur, said his resiliency in Saturday’s tough weather conditions was a key to his victory.

“It was such an odd thing,” he said of the storm. “Whenever you come out of it, you think, ‘That could’ve been really bad.’ I just hung in there. That’s what golf is: you can’t complain. The elements are part of it.”

Stephenson started the final round with a one- shot advantage over Ed Brooks, the 1997 Texas Amateur and Southern Amateur champion. Stephenson led by two over Texas Golf Hall of Famer and 2010 Texas Senior Amateur winner John Grace from Fort Worth. Stephenson and Brooks birdied the first hole. For the next 90 minutes, Stephenson kept Brooks and Grace at arm’s length with a succession of clutch par saves. A change in his putting game proved to be a major difference maker.

During Thursday’s practice round, Stephenson switched to a left-hand low putting grip. He said the new look and feel of the grip provided a great deal of comfort. Over the years, he’s gone back and forth between a left-hand low and conventional putting grip.

“My putting was really good,” he said. “I made some critical five- and six-footers for par today. I was steady with those five- and six-footers putts and didn’t let them derail me.”

San Antonio’s Pierce, playing a group ahead, turned 55 years old on Friday. It was the last day possible to be eligible for the tournament, reserved for senior amateurs aged 55 and older. Pierce promptly took a lost ball after his first competitive shot in senior amateur play. He rallied and made three birdies on the front nine. Pierce made the turn at 2-under overall to jump into contention.

Meanwhile, Brooks made a double-bogey on the par-4 seventh hole to disrupt his momentum. Stephenson made it a three-shot swing with a birdie on the hole. He looked to be in trouble on the eighth, however. Stephenson drove the ball into a fairway bunker, and then hit his second shot under the lip of a bunker in front of the green. Undeterred, Stephenson blasted out to seven feet and calmly rolled in the putt to save par.

A birdie on the par-5 ninth hole gave Stephenson a two-shot lead over Pierce. Brooks and Grace failed to make up ground on the back nine, and Stephenson ultimately made enough pars down the stretch to hold off Pierce. Both players birdied the final hole.