TURNBERRY, Scotland (Ticker) -- Jennifer Rosales surprised herself with a personal best 7-under-par 65 on Saturday and shares the lead with Sweden's Carin Koch after the third round of the British Open.

Born in the Phillipines, Rosales had seven birdies in a bogey-free round to tie the women's course record here at Turnberry and is 12-under 204 overall in the last major of the season.

"I am really surprised," said Rosales, who had a career-best finish of third last year at The Office Depot. "I really felt good this week hitting my drives in the fairways. I did what I could today. I made my putts."

Rosales was a five-time champion of the Phillipine Ladies Amateur Open from 1994-98 and won the NCAA individual title as a freshman at the University of Southern California in 1998.

Koch continued her consistent run with a third straight round of 68. She bogeyed the 17th hole after missing a four-foot shot for par, but closed with a birdie on 18 with a 9-iron to 30 feet.

American Natalie Gulbis fired a 67 on Saturday and shares third place with Paula Marti of Spain at 10-under.

Karrie Webb of Australia carded a 70 on Saturday and is tied with fellow Australian Michelle Ellis and Americans Tina Barrett and Beth Bauer at 9-under.

Taiwan's Candie Kung, who shared the second-round lead with Koch, shot a 71 and is also three strokes behind the co-leaders.

(MORE)