Ireland's Rory McIlroy and Graeme McDowell moved two strokes clear at the World Cup Saturday and savored the prospect of adding their names to an illustrious list of previous winners. The pair gelled superbly to record eight birdies, including three in succession from the fifth hole, to record an eight-under par 64 and improve their score to 21 under on the Blackstone course. Matt Kuchar and Gary Woodland of the United States, South African pair Charl Schwartzel and Louis Oosthuizen and the German duo of Martin Kaymer and Alex Cejka share second on 19-under par. “It would be incredible for G-Mac (McDowell) and myself to be able to add our names to the list of names and countries on the trophy, the likes of Jack Nicklaus, Arnold Palmer, Ben Hogan and Sam Snead,” McIlroy to reporters. “They're just two American teams and feature four of the best players ever to play the game. So to be able to put your name on a trophy alongside their names would be something special.” Ireland, which has won the Cup twice before, led by a stroke with a round to play two years ago but was beaten into second place by Italy. The US team recorded an eight-under par 63 while Germany and South Africa had 11-under 61s. The last Americans to win the title was Tiger Woods and David Duval in 2000 in Argentina. The Australian team of Brendan Jones and Richard Green birdied the opening two holes but struggled mid-round to record a 67 and fall back to 18-under par. Kim takes 3rd-round lead In Coolum, Australia, K.T. Kim played steadily over the back nine while challengers fell around him, shooting a bogey-free 5-under-par 67 Saturday to take a one-stroke lead over Bubba Watson into the final round of the Australian PGA. Watson, who held the lead for part of the third round, double-bogeyed the par-5 15th with two bad chips out of the rough to finish with a 69 after eagling the opening par-5 first. Aaron Baddeley was in third place after a 67, three strokes behind. Second-round leader Marcus Fraser (74), Y.E. Yang (70) and David Bransdon (67) were tied for fourth, four strokes behind. Otto surges into lead Home favorite Hennie Otto surged into a three-shot lead with a 7-under 65 at the third round of the South African Open Saturday as Retief Goosen and Ernie Els both stumbled. The South African leads from a four-way tie for second made up of Goosen, Sweden's Magnus Carlsson, Thomas Aiken and Garth Mulroy. Goosen (71) couldn't capitalize on a blistering start where he birdied his first three holes. He had bogeys at Nos. 9, 13, 17 and 18 for his worst round at the €1 million ($1.3 million) European Tour tournament this week.