Tommy Biershenk, Matt Peterson, Charles Warren and Chris Wollmann all shot 6-under-par 64s at the 6,619-yard Hardscrabble Country Club.
Though he has yet to win in 2001, Peterson ranks ninth on the season money list.
Biershenk stands in 34th place in earnings, while Wollmann resides in the 58th position. Warren is languishing outside the top 100.
This week's winner will garner $76,500.
Full-field scores from the Buy.Com Fort Smith Classic