The Latest: Amateur Davis Thompson in early U.S. Open lead Justin Thomas, of the United States, left, and Tiger Woods, of the United States, walk up to the seventh green during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Thomas Pieters, of Belgium, lines up a putt on the ninth green during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Tiger Woods, of the United States, plays a shot from a bunker on the fifth hole during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Justin Thomas, of the United States, left, and Tiger Woods, of the United States, wait to putt on the 17th green during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/Charles Krupa)
Tiger Woods, of the United States, waits to hit on the 13th hole during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/Charles Krupa)
Patrick Reed, of the United States, checks his lie on the 17th green during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/Charles Krupa)
Hideki Matsuyama, of Japan, Jordan Spieth, of the United States,and Patrick Reed, of the United States, during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Justin Thomas, of the United States, talks to an official on the 17th fairway during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/Charles Krupa)
Phil Mickelson, of the United States, rubs sanitizer on his hands before teeing off on the third hole during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Phil Mickelson, of the United States, walks along the second fairway during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)
Associated Press
Justin Thomas, of the United States, left, and Tiger Woods, of the United States, walk up to the seventh green during the first round of the US Open Golf Championship, Thursday, Sept. 17, 2020, in Mamaroneck, N.Y. (AP Photo/John Minchillo)