Shane Lowry is still due to take part in the event.
Graeme McDowell has confirmed his withdrawal from this week's Travelers Championship on the PGA Tour.
The 2010 US Open winner is to stand down after his caddie Ken Comboy tested positive for Coronavirus.
He's the second player to withdraw from the tournament after golfer Cameron Champ tested positive for Covid-19.
McDowell says he's withdrawing from the event "for the protection of the field", as well as his own physical and mental well-being.
Cameron Champ has withdrawn from the Travelers Championship after testing positive for COVID-19 during pre-tournament screening on Tuesday.https://t.co/NFi0K13oqi
— PGA TOUR (@PGATOUR) June 23, 2020
Ireland Name Nine New Caps For Six Nations Squad
Panthers Promotion Hopes Dashed On Final Weekend
Colaiste Mhuire Mullingar: All Ireland Champions
Dublin Sink Offaly In Camogie
Lowry Looks On Shaky Ground Since Cognizant Collapse
"Unhappy" Laois Leave Fermanagh With Some Regret
Laois Ladies Football Legend Honoured By County Council
Westmeath School Primed For All Ireland Final Shot
Offaly Relegated After Cavan Defeat
Offaly And Longford Chase Semi-Final Spot In Division Four
NFL: Laois Travel To Fermanagh For Crucial Division Three Encounter
Gold Cup Takes Centre Stage On Final Day Of Cheltenham
Offaly TD Demands Stronger Ticket Touting Laws As Six Nations Prices Hit €3k
Offaly Travel To Dublin For Fourth Round Of National Camogie League
Athlone Town Get Title Defence Underway Tomorrow
NFL: Must Win Game For Westmeath In Division Three
Westmeath County Council To Host Civic Reception For Athlone Town
Midlands Players Named In Ireland Squad For Showdown With Scotland
Irish Athletics Legend Ronnie Delany Dies Aged 91