South Korea's Noh Seung-yul will take a two-shot lead into the final day at the Zurich Classic in New Orleans.
Noh's 65, seven under par, means the 21-year old is on 18 under-par for the tournament. It represented his third consecutive bogey-free round as he became the first player to complete 54 holes at TPC Louisiana without a bogey.
Another consistent round from Noh saw him overhaul the overnight leader Ben Martin. Martin struggled on day three as he carded a 73, one over par, which has seen him drop to a share of fourth and four shots behind Noh.
Noh's nearest contender is Keegan Bradley who trails by two shots. Bradley was leading Noh going into the 14th hole but three consecutive birdies on 14, 15 and 16 saw Noh match Bradley's third round score of 65.
Bradley shot eight birdies during his round but bogeyed the par-three ninth and sits in second while Robert Streb is in a third, one shot further back, after of round of 68.
Bradley admits that he is comfortable being just two shots behind leader Noh Seung-yul.
"I'm most proud this week of where I've been mentally on the golf course and how calm I've felt," Bradley told reporters.
"I love being in this position, a couple back going into Sunday. I'd like to be a couple in the lead, too, but I love chasing."
Martin is in danger of throwing away his remarkable start to the tournament. He led after the first two days after a course-record 62, 10 under par, on Thursday.
But he struggled to gain any momentum on his third day with bogeys on the second and ninth and his only birdie coming on the seventh hole.
England's Paul Casey shot the best round of the day, 64, which put the 36-year old up to a share of seventh as his six birdies on the back nine meant he's just five shots off the lead.
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