Lang and Kerr had completed 36 holes over the difficult Oakmont Country Club course at 1-over 143. Lang, the first-round leader, fired a 74 and Kerr, the runaway winner last month at the LPGA Championship, shot a 71.
The only player in front of Lang and Kerr on the leader board was Sophie Gustafson, but she faced a long day of golf Saturday when the second round was scheduled to begin at 7:30 a.m. EDT.
Gustafson was even par for the tournament through one hole of the second round. Only two sub-par rounds have been shot thus far in the most significant event in women's golf.
Half the field had yet to complete the second round when the rains came Friday. After the second round is completed Saturday, the 36-hole cut will be made and the survivors will begin the third round going off both the first and 10th tees.
The final group in the third round is expected to begin play about 5:30 p.m. EDT, which means the round will not be finished until Sunday.
Cristina Kim was the only player to have finished 36 holes at 144 -- one shot behind Lang and Kerr.
Those at 1-over with most or all of their second round to play included Jeong Eun Lee, Wendy Ward, Shinobu Moromizato and Kristy McPherson.
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