Mark Hubbard is on the verge of a career-defining moment. The 33-year-old PGA Tour veteran fired a stunning 7-under 64 on Saturday at the Myrtle Beach Classic, surging into the solo lead with a blistering late stretch of birdies. Hubbard birdied four of his final five holes at the Dunes Golf and Beach Club, settling for a par at the last to cap a day of low scoring and high drama.

At 16-under 197, Hubbard holds a one-shot advantage over England's Aaron Rai, who also caught fire with four straight birdies to open the back nine before closing with five consecutive pars for a 66. For Hubbard, this is more than just another Saturday leaderboard—it's his 274th start on the PGA Tour, and he's still chasing his first win. A victory here would also punch his ticket to next week's PGA Championship.

What's made the difference? Hubbard credits a shift in mindset. "I felt like I had some of the best ball control I've had all season, maybe my whole career today," he said. "But I felt like I was leaving a few out there in the middle of the round. I think Mark a couple of weeks ago would have gotten pretty frustrated and turned a 64 into a 68. I just stayed really patient, kept hitting good shot after good shot, and eventually the putts started going in."

The leaderboard is packed with firepower. Eight players are within five shots, including two of the biggest names in golf. Brooks Koepka shot a 64 of his own to climb into a tie for eighth at 11-under, giving himself a real chance at his first win since returning to the PGA Tour from LIV Golf. "If I can continue to do what I did today as far as ball-striking—and I feel like I've done that over the past three months—it's just a matter of getting that putter heated up," Koepka said. "I'm striking it as good as I ever have, driving it as good as I ever have."

Also lurking at 11-under is 45-year-old Brandt Snedeker, the U.S. Presidents Cup captain, who carded a 67. With a mix of seasoned veterans and hungry contenders, Sunday at Myrtle Beach promises to be a shootout. For Hubbard, the dream of a first PGA Tour title—and a major championship berth—is now just 18 holes away.