Not a one-stroke edge after four holes, as Irwin had.
But Duval won by making two difficult pars on the final two holes to keep a one-stroke edge over Furyk, who was in the clubhouse at 10 under.
That gave him a one-stroke edge over Tom Purtzer, who birdied the last two holes.
In the Nashville tournament, Dent went into the final round with a one-stroke edge over Bob Murphy, who closed with a 69 to wind up at 205.
Mike Hulbert, shooting 63, was the leader, making a 15-foot birdie putt on his final hole to take a one-stroke edge.
Starting the day, Trevino will have a one-stroke edge.
Shooting a third-round two-under-par 70 today, and taking the lead over bigger names, Tanaka held a one-stroke edge heading into Sunday's final round.
Norman, who began the day with a one-stroke edge over a tightly bunched leaderboard, closed with a battling 69.
Shooting a six-under-par 66, Day ended the day with a one-stroke edge over Fred Couples and Rocco Mediate.
So instead of heading into Sunday's final round with a cushion, Funk will have a one-stroke edge and a host of competitors in pursuit.