Graeme McDowell has withdrawn from this week’s Travelers Championship in Connecticut after his caddie tested positive for coronavirus.
Ken Comboy returned a positive test on Tuesday, prompting McDowell, who tested negative for the virus earlier this week, to pull out.
McDowell told Golfweek: “For the protection of the field, and for my own physical and mental well-being, I’m going to take a test tomorrow morning then jump on a private plane.
“I’m going to get myself out of here, home to Florida and decide whether I need to quarantine myself from my family.”
American golfer Cameron Champ has already tested positive for the virus during pre-tournament screening at the event, which starts on Thursday.
Nick Watney also tested positive immediately before his second round at last week’s RBC Heritage tournament, which marked the sport’s return following the lockdown.
Amid rising fears over the spread of the virus within the sport, the PGA Tour is expected to announce results from its full pre-tournament screening programme on Wednesday.
The 26-year-old California native revealed he has stuck to a 3,500 calorie a day diet.
The American was forced to pull out of the Rocket Mortgage Classic.
The world number one has become frustrated by errors that have kept him out of contention.
Brendon Todd led the way after the third round of the Travelers Championship.
McIlroy is four shots behind leader Phil Mickelson after seven withdrawals from the event due to Covid-19
Matt Wallace opens up on his lucky escape at the coronavirus-hit Travelers Championship.
Seven players have now withdrawn from the PGA Tour event for reasons relating to Covid-19.
The Northern Irishman shot seven-under 63.