Aug. 7—TULSA, Okla. — Mary Kelly Mulcahy was defeated 7-and-5 by Rachel Kuehn (Wake Forest) in the first round of match play at the Women's U.S. Amateur on Wednesday at Southern Hills Country Club. Mulcahy, a Lima Central Catholic graduate who is a senior at the University of Findlay, was down by only two holes through the eighth hole before Kuehn won the next five holes at No. 9 through No. …