Bryson DeChambeau opened up a two-stroke lead at the Safeway Open after firing an eight-under 64 in the second round, while Tony Romo missed the cut.

American DeChambeau produced a bogey-free round in Napa, California, to move into 12 under on Friday.

DeChambeau made three birdies on the front nine before five more followed, including three straight from 10 through 12.

A five-time winner on the PGA Tour, DeChambeau holds a two-shot lead over Nick Watney (65).

Justin Thomas carded an eight-under 64 to be among five players tied for third at nine under.

Nick Taylor (66), Dylan Frittelli (65), Adam Long (68) and Cameron Champ (68) are alongside Thomas.

Defending champion Kevin Tway was among those who missed the cut after shooting rounds of 71 and 72.

Romo, the Dallas Cowboys great and an amateur golfer, fired a second-round 78 to finish at four over.

Cameron Tringale and Andrew Landry earned a share of the one-stroke lead after the third round at the John Deere Classic.

Tringale carded a six-under-par 65 and fellow American Landry posted a penultimate-round 67 to rise to the top of the leaderboard on Saturday.

Seeking his maiden PGA Tour title, Tringale had seven birdies and a bogey as he climbed three positions at TPC Deere Run.

Landry – winner of last year's Texas Open – is also 16 under through 54 holes following a round which included six birdies and a pair of bogeys on the back nine.

Bill Haas, who has not won an event on Tour since January 2015, is one shot back following his seven-under-par 64, alongside Adam Schenk (66).

Four golfers are tied for fifth at 14 under, including Nick Watney (64) – who continues to have an under-the-radar solid season.

Meanwhile, Matthew Wolff continues to impress after his third-round 67 to be tied for 33rd.

Wolff won the 3M Open in just his third professional start last week, having won the NCAA individual title with Oklahoma State six weeks earlier.

"I would not be surprised if he was on that Presidents Cup team that went to Australia," Charles Howell III said on Wolff. "He would be a guy to look at if I was Tiger [Woods]."

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