The PGA Championship is off to a thrilling start at Aronimink Golf Club near Philadelphia, and the leaderboard is as crowded as a Saturday afternoon at the clubhouse. World No. 1 Scottie Scheffler is living up to the hype, firing a 3-under 67 in cold, blustery conditions to share the first-round lead with six other golfers. But if you were hoping for a weekend showdown between Scheffler and two-time defending Masters champion Rory McIlroy, you might want to look away—McIlroy stumbled to a 4-over 74, leaving him with work to do just to make the cut.

Scheffler, who finished runner-up at the Masters last month, is proving why he’s the top dog in golf. Joining him at 3-under are a mix of rising stars and seasoned pros: Aldrich Potgieter, Stephan Jaeger, Min Woo Lee, Rio Hisatsune, Martin Kaymer, and Alex Smalley—the only other American besides Scheffler in the top tier. Just one shot back are Daniel Brown, Corey Conners, Shane Lowry, Patrick Reed, Sahith Theegala, and Max Greyserman, setting the stage for a wide-open tournament.

While Scheffler thrives, the big names are struggling. Dustin Johnson and Ludvig Aberg are at 2-over, Viktor Hovland and Keegan Bradley are at 4-over, and Max Homa, who barely got in as an alternate, sits at 5-over. The most shocking round of the day? Bryson DeChambeau’s 6-over 76. And for Utah fans, there’s a notable absence: Tony Finau, who rose to third alternate but couldn’t crack the field, missing his second straight major after a streak of 33.

With the cut projected around 2-over, McIlroy has his work cut out. But as golf talk radio host Brian Taylor noted earlier this week, “Scottie has finished runner-up in three consecutive events, and Rory is feeling great after his second Masters. Cam Young could also wreck the party.” Whether it’s a classic duel or a surprise contender, the first round has set the tone for an unpredictable weekend. Grab your gear and settle in—this major is just getting started.