Tiger Woods of the United States reacts to a birdie on the ninth green during the third round of the 147th Open Championship at Carnoustie Golf Club on July 21, 2018 in Carnoustie, Scotland. Andrew Redington/Getty Images

Jordan Spieth shot a 6-under 65 in the third round Saturday at Carnoustie Golf Links in Angus, Scotland, to share a three-way lead at -9 with fellow Americans Xander Schauffele and Kevin Kisner, as he attempts to become the first player in a decade to win back-to-back Open Championships.

Spieth, who is seeking his fourth major, described 2018 as an "off year."

“I don’t feel like I have to prove anything to anyone at this point,” he said. “I’m playing golf for me now. I have got a clear mind. I have made a lot of progress over a year that has been an off year — a building year. I’ve got an opportunity to make it a very memorable one.”

Pádraig Harrington of Ireland is the last golfer to win consecutive Open Championships.

Kevin Chappell, another American, is also in contention at -7, and is followed by Italian Francesco Molinari at -6.

Many notable names are tied for sixth, including Tiger Woods, who shot a 5-under 66 as he seeks his first major since the 2008 U.S. Open. It was his lowest round at a major since the 2011 Masters.

"I played well today, I really, really did," Woods told reporters Saturday. "I hit a lot of good shots, and I didn't feel like I really made a bad swing until 18. I really felt like I had control of the golf ball."

It was vintage Woods. With three birdies in his opening nine holes, Woods even energized the crowd when he rolled in a 40-foot birdie on No. 9.

The 42-year-old has long been pursuing his 15th major win but has been slowed by injuries and personal issues over the years. There has been great anticipation that he would one day regain his form at a major.

“It’s been a few years since I’ve felt like this,” said Woods, who shot a 71 in both the first and second rounds.

"Here I am with a chance coming Sunday in a major championship," Woods said. "It’s going to be fun.”

Also tied for sixth are Rory McIlroy, Tommy Fleetwood, Zach Johnson, Webb Simpson, Alexander Noren and Matt Kuchar. There are also seven tied for 13th place.

Oddsmakers at Sky Bet list Speith as the favorite at 7/4. He is followed by Schauffele (5/1) and Kisner (6/1). Molinari, McIlroy and Woods all have 14/1 odds.