2024 Arnold Palmer Invitational leaderboard, scores: Shane Lowry's 66 leads crowded pack after Round 1

Scottie Scheffler, Jordan Spieth and Justin Thomas are all in the mix at Bay Hill

It was a fun day from start to finish at tricky Bay Hill during the first round of the 2024 Arnold Palmer Invitational. Shane Lowry leads at 6 under after a scorching back nine 31, but he has some world-class company and is not even the favorite despite being a major winner and two-time champion on the PGA Tour.

Jordan Spieth had a wild Thursday (no surprise), Scottie Scheffler struggled with his putter (also no surprise), and Justin Thomas, Will Zalatoris and Sam Burns all played their way onto the leaderboard by the end of Round 1 at Bay Hill.

Let's take a closer look at Lowry's round and who's chasing him at the end of Round 1.