Spieth remains in contention

Jordan Spieth carded a second round five-under-par 67 to remain in contention at the PGA Championship after Friday's truncated round at Whistling Straights.

The 22-year-old world number two is bidding to become only the third person in history to win three majors in a season – after Ben Hogan and Tiger Woods – having already won the US Open and Masters titles in 2015.

The American's round leaves him on six-under, three shots behind clubhouse leaders Jason Day and Matthew Jones, who still have to complete their respective second rounds.

"We are free-rolling now," the American joked after making the cut at the year's final major for the first time in his career.

"I'm just happy to be back in contention and position. If I'd had a bit of a lull today it would have been too hard to make up."

The popular Texan has had a break-out year on the PGA Tour in 2015 and apart from his two major titles, finished one stroke outside the playoffs at the Open Championship, won twice more and finished in the top 10 on eight other occasions.

"I feel good. I've got a chance to win a major championship. Just thinking about that gets you enough adrenaline that there won't be any issues," he added.

"I noticed last year for the first time I felt fatigue and felt like I had overworked and kind of burned out the end of the year, as we had to go through the four play-off events without a break and then into the Ryder Cup. This year I've done a better job of when I take time off, when you limit the practice coming back, how to prepare.

"As far as mentally in this position, the way the year's gone, I approach each event as if it's the only event of the year when I stand on the first tee. That gets me through it. I'm sure at the end of this year, it will be nice to sit back and hang the clubs up for a couple weeks, but until then we have got a lot to play for."