In the statistics-conscious world of sport, where men patently run faster, jump higher and throw farther, women are doggedly becoming more visible and more valuable. Most of their recent, considerable gains have been in sports in which they compete among themselves, particularly tennis, golf, track and field. But some women have begun to enter the male domains of horse racing, motorcycling, and even baseball umpiring.
Two who have contributed dramatically to the growing success of women in professional athletics are Tennis Pro Billie Jean King and Jockey Robyn Smith. In 1971, at...