Cristie Kerr, 34, who's been in the top 10 on the Rolex World Ranking for over eight years straight and peaked at No. 1 three times in 2010, has finally had to relinquish the title of top-ranked American to 27-year-old Stacy Lewis. Lewis, who has won twice this season (the Mobile Bay LPGA Classic and the Shoprite LPGA Classic) and has eight top fives in 13 starts, has shot to No. 2 in the world and is aiming higher. "I'm ready to take [Yani Tseng] on," Lewis said last week. "I want to be No. 1 in the world. I know I'm No. 2, but I'm not happy with that."