Phil Mickelson maintained a four-stroke lead at the Phoenix Open golf event, despite denting an otherwise strong second round with a double bogey at the 18th hole.
Mickelson, who missed shooting golf's magic number of 59 in the first round by only one shot, followed up with a six-under-par 65 for a 17-under total of 125.
His stumble at the finish, however, meant he missed out on the US PGA Tour's 36-hole scoring record.
His second round included six birdies and an eagle at the par-five 15th and left him four strokes in front of Bill Haas.
Haas carded a seven-under 64 that included seven birdies for 129.
Keegan Bradley had seven birdies and an eagle in an eight-under 63 that put him on 130, tied with Brandt Snedeker, who posted a 66.
