Ricky Barnes and Lucas Glover are in the box seat to win the US Open as the American duo will resume a rain-affected event five shots clear of the field on Monday.
The unheralded American pair are seven under par after playing the first hole of their final rounds at Bethpage State Park.
They will resume play on Monday comfortably ahead of a chasing pack which includes world number two Phil Mickelson, former Open champion David Duval, Hunter Mahan and England's Ross Fisher at two under par.
World number one and pre-tournament online betting favourite Tiger Woods is level par after completing seven holes of his final round.
Meanwhile, Sebastian Vettel cruised to his second victory of the year by tasting success in the British Grand Prix at Silverstone.
Red Bull secured a one-two as Mark Webber finished second in an incident-free race while Brawn's Rubens Barrichello was third and championship leader Jenson Button sixth.
Vettel took full advantage of his pole position to lead at the first corner and built up a healthy advantage in the opening laps as Webber was caught behind Barrichello.
Felipe Massa's Ferrari was fourth after holding off a challenge from the Williams of Nico Rosberg.
Toyota's Jarno Trulli was seventh, just ahead of Ferrari's Kimi Raikkonen while last year's winner, Lewis Hamilton, had to settle for 16th.
In football, USA staged a remarkable comeback to book their place in the semi-finals of the Confederations Cup.
The US had lost their opening two games but, with Brazil 3-0 winners against Italy in the other Group B game, they went through at Egypt and Italy's expense.
Charlie Davies, Michael Bradley and Clint Dempsey were the goalscorers for a delighted US side.
Brazil cantered to their own 3-0 success courtesy of two strikes from Luis Fabiano and an Andrea Dossena own goal.
The South Americans will now take on hosts South Africa in the semi-finals, with the USA facing reigning European champions Spain.
In rugby league, St Helens overcame a slow start to eventually thrash Bradford Bulls 44-18 and claim their 16th successive away win - beating a Super League record that has stood for over a decade.
Saints opened the scoring through Francis Meli before Bradford took a shock lead thanks to tries by Glenn Morrison and Rikki Sheriffe.
The visitors responded by scoring four tries before half-time though with James Roby, Jon Wilkin, Chris Flannery and Kyle Eastmond all crossing as Saints cantered into a 28-14 lead.
It was one-way traffic in the second half although Semi Tadulala did grab a 63rd-minute try for Steve McNamara's team.
Saints added three more tries to their tally after the interval with Maurie Fa'asavalu, Tony Puletua and Meli all crossing as Mick Potter's side re-established a four-point lead over second-placed Leeds Rhinos.