Harris English has become the fifth golfer on the PGA Tour to test positive for the coronavirus ahead of this week's Rocket Mortgage Classic in Detroit.
The 30-year-old American, who is a two-time winner on the PGA Tour, tested positive for Covid-19 as part of the Tour's pre-tournament screening process and has withdrawn from the event as a result.
English, who was not displaying symptoms prior to receiving his test, did not play at last week's Travelers Championship and will now have to self-isolate for 10 days before testing negative twice in order to return.
English's positive test follows similar results for fellow golfers Nick Watney, Denny McCarthy, Cameron Champ and Dylan Frittelli, all four of whom are isolating under the Tour's guidelines to protect players.
Graeme McDowell's caddie Ken Comboy and Portrush's Ricky Elliott, who caddies for four-time Major champion Brooks Koepka, also tested positive prior to last week's Travelers Championship, leading to both players withdrawing from the event, as did World No.5 Webb Simpson after a family member began displaying symptoms.
The PGA Tour have implemented heavier restrictions moving forward after the recent uptick in positive cases, starting at this week's Rocket Mortgage Classic.
While players could travel to the course and warm up while waiting for results from a test at previous tournaments, now they must not travel on-site until they have received a negative result.