Brooks Koepka is reportedly the latest golfer to pull out of this week's Travelers Championship on the PGA Tour after caddie Ricky Elliott tested positive for the coronavirus.
Portrush native Elliott has been on the bag of Koepka for all four of the American's major wins, but will miss the Connecticut event.
As a result, Koepka has withdrawn from the event, "to protect everybody else".
"I don’t want to risk anyone’s life if they have respiratory issues or underlying conditions. The only way this Tour can continue is if guys do this sort of thing and be proactive about it.
"We all got tested Monday - myself, [coach] Claude [Harmon] and Ricky. We all came back negative. We had no symptoms. Nothing."
Koepka added: "The right thing to do right now is get home, support Ricky and feel confident that I'm doing what I can do protecting my fellow tour members."
He had played a round with Graeme McDowell on Tuesday, and it was reported earlier that the 2010 US Open winner's caddie Ken Comboy had also tested positive, which means that the two bag men will join Nick Watney and Cameron Champ self-isolating to help prevent the spread of the virus.
Webb Simpson, the 2012 US Open champion who won last week's Heritage title, tested negative twice for the deadly virus but has also withdrawn after a family member tested positive. He plans to quarantine in North Carolina.
However, PGA Tour commissioner Jay Monahan revealed the tournament will still go ahead this week, despite the three positive tests.