The 108th PGA Championship kicked off Thursday at Aronimink Golf Club in Newtown Square, Pennsylvania, and it didn't take long for the drama to unfold. Braden Shattuck, one of 20 club professionals in the 156-player field, was given the honor of hitting the opening shot—a moment that quickly turned into a microcosm of the uncertainty surrounding this year's second major.

Shattuck pulled his drive toward the fence line, leaving him unsure whether the ball stayed in bounds. After hitting a provisional, he learned his original shot had landed just inside the fence. The PGA director of instruction at Rolling Green, located just 10 miles from Aronimink, had to take a one-shot penalty for an unplayable lie next to the fence, hacked out of the rough, and settled for a double bogey—a tough start for the local pro.

Aronimink hasn't hosted a major since the 1962 PGA Championship, and a restoration project nearly a decade ago added bunkers and removed trees, giving the course a fresh look. Overnight rain could soften the layout, but drier weather is in the forecast, with wind that might change the dynamics at any moment. That's the challenge awaiting Masters champion Rory McIlroy and Jordan Spieth in the morning wave, followed by world No. 1 Scottie Scheffler in the afternoon.

McIlroy and Spieth paired together brings the Grand Slam into sharp focus. Spieth needs a PGA Championship win to become the seventh player to complete the career Grand Slam, while McIlroy is the only player with a chance at the calendar Grand Slam—a feat not achieved since Spieth himself captured the first two majors of the season in 2015. With the course set to test every facet of their games, the stage is perfectly set for a memorable opening round.

Stay tuned for live updates as the first round unfolds at Aronimink Golf Club, where every shot could shape the narrative of this championship.