Englishman Brian Davis shot a 6-under 64, and Roland Thatcher had a 65 on Saturday to share the third-round lead in the Travelers Championship at 12 under.
Both are looking for their first win on the PGA Tour.
Davis made an early move, shooting a 29 on the front nine with six birdies. Thatcher overtook him with three straight birdies on the back nine and had a one-stroke lead before missing a 7-foot par putt on the 17th hole.
Seventeen other players were within five strokes of the lead entering the final round.
John Rollins, James Driscoll and Stuart Appleby were two strokes back. Defending champion Fredrik Jacobson, who led after two rounds, shot even par to remain at 9 under.