James Hahn and Ricky Barnes sit atop the leaderboard at the AT&T Byron Nelson in Irving, Texas, after they shot dueling 64s to card first-round scores of six under on Thursday afternoon.
However, Hahn and Barnes don't have much breathing room with Matt Kuchar, Jhonattan Vegas and Jason Kokrak among those sitting two shots back at four under.
Here's an overview of the top of the leaderboard with 18 holes in the books at TPC Four Seasons Las Colinas:
Hahn and Barnes were both in fine form during Thursday's first round, with the former carding six birdies and no bogeys on a blemish-free day.