World No 2 Justin Rose posted a three-under 68 to claim third spot and Paul Casey was in the group of four players a further two strokes back in tied-fourth, while two-time victor Rory McIlroy ended in a share of eighth after a closing 73. He had a 3-under 68 and was two shots behind.
After reaching the par-5 seventh hole in two shots, McIlroy three-putted from 21 feet for an unsatisfying par.
LPGA: In Daly City, California, Sei Young Kim shot a 4-under 68 at Lake Merced to take a three-stroke lead in the LPGA MEDIHEAL Championship.
"(I am) over the moon, man", Homa, the 2013 American collegiate individual champion, said in a greenside interview after punching his ticket for the year's second major, the PGA Championship starting on Thursday at Bethpage in NY.
Dufner, the overnight leader, followed up his second-round 63 with a 71 after making back-to-back bogeys through holes 11 and 12.
"It's been a while since I've been in the lead or competing for the tournament, but I know what that feels like", Dufner said.
Two shots behind at the turn, Korhonen birdied two straight holes to catch Hebert, and Hebert had to birdie the last at Genzon Golf Club for a 69 to force the playoff. He finished off the tournament off by knocking in a 9-foot putt for par. "I didn't get a whole lot out of it", McIlroy said.
He gave one of those shots back on No. 16, where he made his first and only bogey of the day. Six players were separated by three shots going into the final round, a group that includes Justin Rose, who bogeyed the 18th hole from a poor tee shot and shot 68.
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"I didn t beat myself, which was the goal, and Max was playing awesome". I think it's similar here. Obviously, we have a long 18 holes to go on a hard golf course, but I'm proud of the round. He made another birdie on 11 to get to 15 under, which is the place he stood when the horn blew to stop play because of perilous climate going through the territory.
The world number 417 went on to play the remaining holes in level par to secure his maiden PGA Tour win in just his 69th start, picking up a cheque for $1,422,000 and a two-year exemption.
"This golf course really rewards patience and rewards discipline".
This is Lahiri's sixth missed cut in 14 starts and he has only one Top-10, at the Mayakoba Championships.
"I told myself I'm right in the thick of the tournament but you have to stay patient and nearly let it come to you rather than try to chase it", McIlroy said about The Players Championship.
After the 62-minute postponement, Homa sank his short standard putt on 14 and his lead was three with four to play.
McIlroy won his first US PGA title at Quail Hollow in 2010, recalling it came days before his 21st birthday so in America he was underage and not served alcohol, celebrating with apple juice instead of something bubblier.