Chris Stroud and Ross Fisher each shot 6-under 64 on Thursday to share the first-round lead in the Wyndham Championship.
Eight players - defending champion Sergio Garcia, Matt Jones, Robert Garrigus, Jordan Spieth, Trevor Immelman, Morgan Hoffman, Patrick Reed and Andrew Svoboda - shot 65.
John Senden and Stuart Appleby were among the five players at 66 at the final tournament before the PGA Tour's playoffs begin next week.
It was the highest score for an opening-round leader since the tournament returned to Sedgefield Country Club in 2008.
Stroud had eight birdies during his best round of the year, which came at the Donald Ross-designed course that had vexed him through the previous five years.