(Undated)  --  Bubba Watson is withdrawing from this week's Open Championship after being identified as someone who came in close contact with someone who tested positive for COVID.  While the two-time Masters champion has been vaccinated against the virus, he said in a statement that not "enough time has passed to comfortably join the charter flight and risk exposure to the other players and personnel on board."  Thirteen golfers have withdrawn after former Open champion David Duvall withdrew on Sunday.  The 149th Open Championship will be held at Royal St. George's starting on Thursday.