Complex sentence: Pam Teeguarden (born April 17,1951) is a former American professional tennis player in the 1970s and 1980s, ranked in the top 20 from 1970--1975, according to "John Dolan's Women's Tennis Ultimate Guide", prior to computer rankings.
Split into simpler sentences: Pam Teeguarden (born April 17,1951) is a former professional tennis player from the United States who played in the 1970s and 1980s. She was ranked in the top 20 from 1970 to 1975, according to "John Dolan's Women's Tennis Ultimate Guide", before computer rankings.