Adam Scott is set to tee off at his 100th major championship next week at the PGA Championship—an incredible milestone that also marks his 99th consecutive major start. But at 45 years old, the Australian isn't content to simply be a testament to longevity. He's hungry to prove he can still compete at the highest level.

"My head's still really in it—like I should be able to compete and win these things, so maybe I don't see it as much of an accomplishment," Scott said of his remarkable streak. "I'll give myself a pat on the back, but I would love to still win."

Scott made his major debut at the 2000 British Open, missing the cut, but he hasn't missed a major since the 2001 British Open. That kind of consistency is rare in any sport. The only player with a longer consecutive majors streak is the legendary Jack Nicklaus, who played in 146 straight from the 1962 Masters through the 1998 U.S. Open.

Currently ranked 43rd in the world, Scott needs to stay inside the top 60 after the PGA Championship at Aronimink to qualify for the U.S. Open and extend his streak to an even 100 in a row. But for a player who captured his lone major title at the 2013 Masters, the numbers aren't what drive him.

"I don't want to be the guy yet who just has all these other things that aren't based around winning events," Scott said. "I would rather win some stuff and let's celebrate winning the U.S. Open than just playing in it."

Scott credits his longevity to smart preparation and a healthy approach to the game. "I've had generally great advice around me from a physical and training standpoint that has kept me healthy and pretty much injury free," he explained. "I don't really have niggles and things that are concerning, certainly not to the point of can I play this week or not."

There are signs that Scott's game is rounding into form at just the right time. Last week at Doral, he posted his first bogey-free weekend since 2007, finishing fourth and matching his season-best result from Riviera in February. It's the kind of momentum that could carry him deep into contention at a major.

"To win a major I'm going to need to put four days together, not just a weekend coming from behind," Scott said. "I feel like my game is there. I'm doing all the things I think I need to do to be in that kind of condition."

With 14 PGA Tour victories to his name—the most recent at Riviera—Scott knows what it takes to close. Now, as he prepares for his 100th major start, the veteran is focused on one thing: adding another trophy to the collection.

"Keep this confidence going and hopefully arrive at the US PGA full of confidence," he said. "Four good days and you just never know."