John Pak raced to the top of the first-round leaderboard after posting a score of 63 (-7). Nine golfers are currently tied for second at 4 under, with J.J. Spaun the only one currently ranked among the top 30 in the world.

The Charles Schwab Challenge begins Thursday at Colonial Country Club in Fort Worth, Texas. Split-tee action begins at 8 a.m. EDT. PGA Championship winner Scottie Scheffler and defending Schwab winner Davis Riley (along with Daniel Berger) go out at 1:45 p.m.

Ben Griffin shot a 7-under 63 in the Charles Schwab Challenge at Colonial to share the second-round lead with Matti Schmid at 11 under.