Former champion Padraig Harrington has withdrawn from next week’s PGA US Championship in San Francisco.
The Irishman, who won in 2008, has not given a reason, but he has not played competitively since golf was suspended in March amid the Covid-19 pandemic.
Former Italian Open champion Francesco Molinari has also retired from the first major tournament of the year at TPC Harding Park.
Harrington, 48, and Molinari, 37, were replaced on the pitch by Americans Talor Gooch and Troy Merritt.
English Lee Westwood and Eddie Pepperell also did not make it to San Francisco for the tournament – which begins August 3 – despite the late easing of quarantine restrictions for players and essential staff.
Golf on the PGA Tour returned in June but no spectators are allowed.
US Open rescheduled at Winged Foot West course in September will be played without fans.
No decision on crowds has yet been made for the major final of the restructured season, the Masters in Augusta, which is now scheduled for November 12-15.