Perennial major contender Louis Oosthuizen sank a monster eagle putt at the final hole to vault into a three-way tie for the lead after the third round at the US Open on Saturday.

South African Oosthuizen’s downhill 50-footer slammed into the middle of the flag and toppled in to add another layer of fascination to what already was shaping up to be a compelling final round Sunday at Torrey Pines.

With a one-under-par 70, Oosthuizen joined surprise element Canadian Mackenzie Hughes (68) and steady American Russell Henley (71) at five-under 208. But the three front-runners did not have to look far over their shoulders to see heavyweights Rory McIlroy (67) and Bryson DeChambeau (68) waiting to pounce just two strokes behind.

Jon Rahm (72) despite a double-bogey is among the trio three behind. Thirteen players are within four shots of the lead.

Oosthuizen, the 2010 British Open champion, has completed the career runner-up grand slam, and just last month was equal second behind Phil Mickelson at the PGA Championship.

“There’s a lot of great players up there that have a chance of winning this, and I just need to go out and play as good as I can tomorrow,” he said.