As the sun rises over Aronimink for Round 2 of the PGA Championship, all eyes are on world No. 1 Scottie Scheffler—and for good reason. Despite his four major championship victories, Scheffler has never led a major after the first round. That changed Thursday when he carded a 3-under 67, tying him with six other golfers at the top of the leaderboard. It's a milestone moment for the game's best player, and he'll be teeing off early Friday morning looking to build on that momentum.

While Scheffler rides high, the story is far different for some of golf's biggest names. Rory McIlroy sits at +4 and Bryson DeChambeau at +6, both dangerously close to missing the cut. For McIlroy, this is unfamiliar territory at a major he's won twice, while DeChambeau will need a near-miraculous round to keep his weekend alive. It's a reminder that even the game's elite can struggle when the course bites back.

Friday's action kicks off at 6:45 a.m. with club pro Michael Block, who impressed with an even-par round on Thursday. From there, the tee sheet is packed with star power and storylines. Here's a look at the key groups to watch in Round 2:

• 8:29 a.m. – Cameron Young, Keegan Bradley, Justin Thomas
• 8:40 a.m. – Scottie Scheffler, Matt Fitzpatrick, Justin Rose
• 1:43 p.m. – Bryson DeChambeau, Ludvig Aberg, Rickie Fowler
• 1:54 p.m. – Xander Schauffele, Brooks Koepka, Tyrrell Hatton
• 2:05 p.m. – Rory McIlroy, Jordan Spieth, Jon Rahm

The morning wave also features a deep field of talent, from Dustin Johnson and Sungjae Im to Martin Kaymer and Patrick Reed. Meanwhile, the afternoon session boasts heavy hitters like Wyndham Clark, Cameron Smith, and Patrick Cantlay. Whether you're tracking Scheffler's quest for a first major lead or watching the stars fight to make the cut, Friday at Aronimink promises plenty of drama.