Last week, the New York Yankees cancelled a signed deal with a hot young prospect from the Dominican Republic. DNA evidence showed he had misrepresented his identity, but such tests soon may be illegal under federal law. Just last year, President Bush signed into law a prohibition on companies testing their employees' DNA. It will take effect on November 21. Major League Baseball has told the New York Times that teams have been conducting such testing for several years. Michael Schmidt co-wrote the story.