Australian Cameron Smith fired a career-low and course record 11-under par 60 to seize the clubhouse lead in Saturday's third round of the US PGA Northern Trust tournament.

The 28-year-old from Brisbane shot a bogey-free 30 on both the front and back nines to stand on 16-under par 197 after 54 holes at rain-softened Liberty National in suburban New York at the first FedEx Cup playoff event.