Louis Oosthuizen emerged from a three-way tie late Saturday with a picture-perfect birdie on the 16th hole to move to 12 under, taking the lead for the third straight round at the British Open.

After consecutive runner-up finishes at the PGA Championship and U.S. Open, the South African will return to Royal St. George's in Sandwich, England, on Sunday looking to secure his second career major title — 11 years after his 2010 victory at the British Open.

Collin Morikawa (68) is a stroke behind at 11 under, with Jordan Spieth in third at 9 under.