Talley, the 19-year-old Princeton, Ky., player coming off her freshman season at Alabama, beat 18-year-old Alison Lee, of Valencia, Calif., 1 up at the Country Club of Charleston.
Lee won Nos. 14-16 to square the match. Talley took the par-3 17th with a par to regain the lead, and won the match with a conceded par on the par-4 18th.
The 17-year-old Feng, from Orlando, Fla., topped Taiwan’s Doris Chen 3 and 2.
Talley and Feng will receive exemptions into the 2014 U.S. Women’s Open at Pinehurst, if they are still amateurs.
WEB.COM: In Springfield, Mo., Alex Prugh followed up his Friday round of 63 with a solid 68 and holds a two-shot lead over four players at 16-under heading into the final round of the Price Cutter Charity Championship.
Daniel Chopra and Andrew Svoboda fired 66s to move to 14-under along with Fernando Mechereffe and Hunter Haas, who shot 67 and 70, respectively at Highland Springs Country Club. Jason Gore shot 66 and is in sixth place.
A host of players including Brad Adamonis, Roland Thatcher, Ryan Nelson, Brett Stegmaier, Russell Knox, Randall Hutchison, Skip Kendall and Miguel Angel Carballo are tied for seventh.
Aiken’s Matt Hendrix made the cut on the number after completing his second round. He then shot 72 in the third round. Augusta’s Scott Parel missed the cut despite shooting 66 in the second round.