Finau's positive test came during the Tour's pre-tournament screening and has entered self-isolation. Bronson Burgoon will replace Finau in Las Vegas.
Finau tweeted a message about his diagnosis, saying, "I am feeling well, and am otherwise in good spirits":
The Associated Press (h/t Sportsnet) noted Finau will also miss the CJ Cup at Shadow Creek next week in Las Vegas because of the self-isolation.
According to the AP, he is the 10th player on the PGA Tour to test positive for COVID-19 since it resumed play on June 8. It has held 18 tournaments since the restart, and Finau is the first to test positive since Scottie Scheffler and Sam Horsfield prior to September's U.S. Open.
Finau is No. 16 in the official world golf rankings and impressed at the U.S. Open by tying for eighth place.
It was one of five top-10 finishes for him since the PGA Tour restarted following its COVID-19 pandemic hiatus.