Walker, a freshman from Warsaw, Va., turned in her third top-five finish of the season as she placed fifth overall at the Gettysburg Invitational over the weekend.  Walker opened with a 91 in the first round, but improved five strokes in round two with an 86 to finish at 177 for the two-day event at Hanover Country Club in Abbottstown, Pa.  She parred 11 holes over both rounds, including six on the final day.