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First 2010 Olympics tickets on sale
Friday, October 3
Romero, who opened with a 65 in the first round Friday, was 14-under 130 for a one-shot lead over Fulton Allem and Joey Sindelar. It was the 53-year-old Argentine's lowest 36-hole total this season by six shots.
Allem and Sindelar also posted 65s Saturday to tie for second place at 13-under 131. Sindelar, who lives near the host course En-Joie, is a seven-time PGA Tour winner.
Joe Ozaki, who led Romero by two shots after shooting a 63 Friday, was seven shots worse in his second round. His 70 dropped him into fourth place at 11-under 133.
Bruce Vaughan (67) and Ronnie Black (68) shared fifth place at 10-under 134, while six more players were tied for seventh at nine-under 135.