Kerr and Hurst were tied for the lead at 18 under par when Hurst stepped on to the 18th tee. Hurst hit her drive on 18 well right of the fairway and the ball was in an unplayable lie, forcing Hurst to take a drop.
Her first few drops landed outside the two club lengths a golfer must drop from. On her fourth drop, Hurst's ball hit a tee she put in the ground to mark the two club lengths. The ball flew farther into the trees than her drive, but she had to play from that spot.
She pitched her third into a bunker, then hit No. 4 to the far right of the green some 50 feet from the hole. Hurst two-putted for a double bogey and now the tournament was up to Kerr.
Annika Sorenstam was in the clubhouse at 17 under and Paula Creamer was playing 18 with Kerr. Kerr hit her drive in the fairway, then knocked her second 35 feet short of the stick.
Creamer found the far right of the putting surface and nearly holed her long birdie putt to match Kerr at minus-18. She two-putted for par and waited for Kerr.
Kerr's birdie try came up 4 feet short, but the tour's third-leading money winner converted to pick up the title.
Kerr posted a 3-under 69 in the final round to win at 18-under-par 270. This was her second win of the season to go along with the Michelob Ultra Open. It was her sixth victory on the LPGA Tour.
Sorenstam fired a 6-under 66 to tie for second at minus-17. Creamer, the overnight leader, only managed a 1-under 71 to join Sorenstam in second at Tartan Fields Golf Club.
Hurst finished with a 2-under 70 and tied for fourth place with Jeong Jang, who fired a 5-under-par 70 on Sunday. The two came in knotted at 16-under-par 272.
Karrie Webb posted a 2-under 70 and shared sixth with Soo-Yung Kang, who only carded an even-par 72. The pair finished at 15-under-par 273, one shot better than Michele Redman, who shot a 72.
Redman came in eighth, but earned enough points for an automatic berth on the U.S. Solheim Cup team. Kerr, Meg Mallon, Rosie Jones, Juli Inkster, Laura Diaz, Creamer, Christina Kim, Natalie Gulbis and Hurst rounded out the automatic qualifiers.
American captain Nancy Lopez announced Sunday that Beth Daniel and Wendy Ward were her captain's picks.
The European team will be Sorenstam, Laura Davies, Maria Hjorth, Iben Tinning, Ludivine Kreutz, Trish Johnson and Gwladys Nocera were the seven players who earned their way on the team through points.
Catrin Nilsmark, the European leader, tabbed Carin Koch, Sophie Gustafson, Karen Stupples, Suzann Pettersen and Catriona Matthew to finalize her team.