Jason Day, who held the outright lead after hole 5, shot 72 and was also 4 shots back.
Watson grabbed the outright lead through eight holes, only to spin out of control on the 477-yard par-4 ninth.
His bogey at the 11th was his final loss of the outright lead.
But the last time he held the outright lead at a major, he faded badly.
He had the outright lead each time, and he won all three tournaments.
Brown entered tonight's game unbeaten in conference play and was looking to take the outright lead in the league.
Norman likes his results as well, and only a bogey at No. 18 cost him the outright lead.
O'Hair laced an 8-iron to 12 feet and closed with one last birdie for the outright lead.
He then missed a short birdie putt at the 17th to take the outright lead.
Woods, who started on the back nine, seized the outright lead on the par-4, 425-yard seventh hole.
