RIO DE JANEIRO (Reuters) - Canada's Graham DeLaet fired a five-under-par 66 to grab the early clubhouse lead but Justin Rose drew the cheers for a hole in one on golf's return to the Olympics after a 112-year absence.
Taking advantage of ideal morning scoring conditions, DeLaet opened defense of the gold medal won by Canada's George Lyon at the 1904 Summer Games, mixing six birdies with a bogey to sit one in front of Belgian Thomas Pieters on the clubhouse leaderboard.
Rose was two off the lead after six holes.