Phil Mickelson needed a birdie on the 18th green Friday to join Billy Horschel atop the leaderboard with the second round of the U.S. Open suspended due to darkness.
Mickelson was the leader when the first round was completed earlier Friday. He opened with a 67, but carded a 2-over 72 in round two to dip to 1-under-par 139 after 36 holes.
He was joined there by Horschel, who fired a 67 in round two to grab a share of the lead.
Luke Donald (72), Justin Rose (69) and Steve Stricker (69) finished at even- par 140. Ian Poulter and amateur Cheng Tsung Pan were also at even-par, but have four and nine holes remaining, respectively.
John Senden (71) and Nicolas Colsaerts (72) finished two rounds at 1-over-par 141, while Mathew Goggin is the only one done at 2-over 142 after a second- round 74.
Tiger Woods and Rory McIlroy are among those tied at 3-over 143. The duo was paired together for the first two rounds, and posted matching rounds of 73-70.
They finished both rounds on Friday as there were a pair of weather delays on Thursday. Second-round action was suspended for the night Friday due to darkness.
Among those unlikely to make it to the weekend are Zach Johnson, David Toms, Graeme McDowell, Darren Clarke, Angel Cabrera and local favorite Jim Furyk.
MORE TO FOLLOW.