 Symptoms range from fever, aches, and tiredness to confusion, loss of balance, and even seizures. After three rounds in the Open in Scotland, Billy Horschel is the leader, shooting a 69 Saturday, sitting at four shots under par. Prior to the start of play today, the world's number one golfer, Scotty Scheffler, was alone in eighth place, two shots off the lead at two under par. I'm Scott Carr.