Nick Watney tested positive at last week’s RBC Heritage, while Cameron Champ and Denny McCarthy returned positive results earlier this week.

Frittelli said that he was surprised by the positive result and he will be going into self-isolation.

“I am experiencing no issues and feel great physically and was surprised and disappointed to learn of the positive test today,” said Frittelli.  

“I’m thankful for the WHOOP strap notification of a minor increase [0.3] in my respiratory rate overnight.

“However, I’m most thankful for the TOUR’s assistance, procedures and protocols, which I will continue to follow during my self-isolation, so as to keep everyone safe.

“I look forward to getting back on TOUR once it’s safe to do so.”

Over the weekend, Frittelli missed the cut during the Travelers Championship in Cromwell, Connecticut, and he has withdrawn from this week’s Rocket Mortgage Classic in Detroit, Michigan.

@MorganPiek OFM Sport