Two weather delays totaling almost 2 1/2 hours made it tough for the 125 contestants to complete 36 holes before dark, but somehow they succeeded.
The Texan put together a closing performance that ranks among the greatest finishes in major championship history.
SOUTHPORT, England (AP) - Branden Grace posted the lowest 18-hole score in 157 years and 422 major championships, and he didn't even know it.
Matt Mattare didn't find the going nearly as easy as he did on Monday when he shot a course-record 63, but a clutch putt at the 16th hole helped him clinch the victory in the Golf Association of Philadelphia major.
Saucon Valley's Matt Mattare fashioned one of the best stroke-play rounds in Golf Association of Philadelphia history, a 63, to lead the Philadelphia Open by four shots with one round to play.
The amateur may have fallen short of becoming the youngest player ever to win a major championship, but she showed plenty of poise finishing in second place.
Some of the strongest, most independent women in sports missed their chance to stand up for themselves when they played the U.S. Open with no hint of dissent.
Shanshan Feng, the leader after each of the first three rounds, played all but two holes of the U.S. Women's Open in par or better but did not make enough birdies to win.
After three days of protests outside the gates of Trump National Golf Club, protesters bought tickets and entered the club grounds on Sunday, including one group that demonstrated after Trump entered his box.
The Philadelphia Open, which used to consist of 36 holes played in one day, is being held over two days this year and the field has been expanded to 133 players.
The South Korean LPGA rookie shot a 5-under-par 67 to overtake Shanshan Feng and win the 72nd women's national championship.
With President Trump watching the U.S. Women's Open, Shanshan Feng, the leader of the championship for the third straight day, talked of her experience meeting the president of China.
Not letting the rainy conditions get the better of her, Feng holds a two-stroke lead midway through the U.S. Women's Open.
The president has arrived at his own golf course, a place where he has spent four weekends since his inauguration, to watch the world's greatest women players.
Wie has been dealing with a neck strain in recent weeks. "It's a miracle that I even played," she said after making it through the first round.