Jason Dufner says he is feeling immensely confident about his game right now and the American is expecting to perform well out on the golf course.

The 38-year-old has not picked up a win since clinching the 2013 PGA Championship, but he is on the right track to end that long run in the CareerBuilder Challenge.

Having led at the halfway stage, the Cleveland-born star managed to produce another stunning round on Saturday to cement his place at the top of the leaderboard on -23.

He made 10 birdies – with seven of those coming on the front nine – and only two bogeys on the back nine stopped the world number 120 extending his advantage further.

Dufner’s eight-under-par 64 has opened up a two stroke gap at the top and the three-time PGA Tour winner, who will be hoping to make the 2016 Ryder Cup team for the event at Hazeltine, admits he feels fantastic at the moment.

“This is the way you want to play,” he said. “This is what we work to do. My mindset’s at a point where, no matter what happens out there, good swings, bad swings, I know that I can shoot good scores.”

Dufner is the 1.67 favourite to win the title but he will be pushed all the way by compatriot Jamie Lovemark, who is sitting in second place on -21 after a third consecutive seven-under 65.

Reigning Memorial Tournament champion David Lingmerth is also following closely behind and the Swede, who is a 17.00 shot to triumph for a second time on the PGA Tour, is sitting in fourth after signing for an outstanding 10-under-par 62 to move onto -18.