Wisconsin - John Daly will not return to finish his second round at the PGA Championship because of a shoulder injury.
Daly notified organisers late on Friday night that he would not be back on Saturday. He was 5 over at the seventh hole in his second round. He shot a 76 in his opening round Thursday.
Daly was in a group with Padraig Harrington and Davis Love III.
The 44-year-old Daly won the 1991 PGA Championship, earning a lifetime exemption to the event. He either hasn't made the cut or withdrawn in 13 of the 17 appearances since his victory, never finishing higher than 32nd.
A five-time winner on the PGA Tour, his best performance this year was a share of 24th at the Puerto Rico Open.