Henley, who was born and bred in Georgia, will now compete in his home-state major championship for the fourth time after the 27-year-old charged home with a seven under par 65 in the final round at the Golf Club of Houston - defeating South Korean Sung Kang by three shots. Henley fell back with a double bogey from the bunker on the par-3 ninth.
What happened was that the charge everyone expected from Fowler never came, and Kang was unable to make a birdie over his final 10 holes.
Henley has played 13 consecutive rounds on the Golf Club of Houston course under par, starting with a closing 66 in 2014, when he tied for seventh, eight under par and seven shots back of victor Matt Jones. As a result, he only made two birdies and cancelled them out with two bogeys. After a bogey on No. 9, Henley got right back on track with a birdie on the 10th.
That left the door open for Henley, who first grabbed a share of the lead with a birdie on No. 7, his fourth of the day and part of a run of three straight.
The threat turned out to be Henley, one of the best putters in golf when he gets it going.
Rickie Fowler and Luke List shared third place at 16-under.
"I knew it was going to be hard". Henley made 10-birdies and overcame a four-shot deficit to earn the victory and secure a spot in the upcoming Masters Tournament.
"I still did OK - I didn't play that well today, but I hung in there", Kang said.
"He's been putting really well since yesterday and the last few days, and then I haven't been putting really well, not like the first two rounds". Only four players have won the Houston PGA Tour event and then gone on to also claim the Green Jacket the next week, most recently Phil Mickelson in 2006. "I'll keep grinding out and working out and hopefully, I can get a chance next time".