American beach volleyball player Taylor Crabb is out of the Olympics after four positive COVID-19 tests, and Tri Bourne will take his place as the partner of four-time Olympian Jake Gibb when the competition begins this weekend.

Crabb confirmed his withdrawal Thursday in a statement to The Associated Press, noting that he was vaccinated and tested negative before he left the United States but tested positive when he arrived in Japan.

U.S. gymnast in isolation after testing positive

U.S. gymnast Kara Eaker is in isolation after testing positive for COVID-19, while teammate Leanne Wong is in quarantine.

Both are alternates for the U.S. team.

Wong continues to test negative but was put in quarantine due to contact tracing.

The U.S. delegation of Simone Biles, Sunisa Lee, Jordan Chiles, Grace McCallum, Jade Carey and MyKayla Skinner worked out on each event during podium training on Thursday.

They're staying in a hotel near the venue rather than the Olympic village, a decision made before they arrived.

Russian swimmer to miss Olympics

Russian swimmer Ilya Borodin, the European champion in the 400-meter individual medley, will miss the Tokyo Olympics after testing positive for the coronavirus.