Martin Laird and Patrick Cantlay share the two-stroke lead heading into the final round of the Shriners Hospitals for Children Open, where Bryson DeChambeau lost ground.
Scotsman Laird and American Cantlay both posted third-round 65s to top the leaderboard at the PGA Tour tournament in Las Vegas on Saturday.
The pair were part of the quintet tied for the lead at the halfway stage of the event, and they moved clear at TPC Summerlin.
Laird was bogey-free after sinking an eagle and four birdies, while Cantlay had six birdies to sit 20 under through 54 holes.
U.S. Open runner-up Matthew Wolff, Wyndham Clark (65), Brian Harman (67) and Austin Cook (67) are tied for third following the penultimate round.
Wolff posted his career-low score on the PGA Tour with a 10-under-par 61. Since 1983, he is the fifth player to make three eagles on either the front or back nine in a round on Tour, doing so on number 11, 13 and 15.
Defending champion Kevin Na and Will Zalatoris (64) – playing on a sponsor exemption – are three shots off the pace and share seventh position in the standings.
Na scored a bogey-free 64 as he looks to join Jim Furyk as the only back-to-back winners of the Shriners Hospitals for Children Open.
Former Masters champion Sergio Garcia (69) and Peter Malnati (71) – one of the overnight leaders – are among a group of players tied for 19th after sliding down the leaderboard.
Meanwhile, it was a tough day for in-form U.S. Open champion DeChambeau following his even-par-71.
DeChambeau was a shot adrift at the start of the day but the 2018 Shriners winner was unable to post his third consecutive round in the 60s after struggling on the front nine, where he had two double bogeys and two bogeys to go with three birdies.
The American had just three double bogeys or worse through his first 18 rounds at the Shriners Hospitals for Children Open, but he had two through six holes on Saturday.