Peter Senior shot a 67 to take a one-stroke lead after two rounds of the Allianz Championship on Saturday.
Senior was at 11-under 133 after a blustery day in South Florida at the Champions Tour event.
He trailed Rod Spittle for most of the day, but birdied the par-5 18th to grab the lead. Spittle bogeyed the 18th to finish with a 67 and a total of 10-under 134. Tom Lehman was tied for second after shooting a 69.
Hale Irwin (68) was tied with Russ Cochran (67) for fourth place at 8-under through two rounds.
Jay Don Blake, Friday's leader at 8-under, dropped back to 7-under and tied in seventh place after two rounds.
Defending champion Bernhard Langer shot a 72 on Saturday and was seven strokes back.