Jerry Yang has made his first move as chief executive of Yahoo, buying the college sports website Rivals.com for an undisclosed sum. The site reports on American football, basketball and other sports in more than 100 colleges and universities as well as focusing on high school sporting prospects. College sports are highly popular in the US and information about them has significant commercial value. Users of the Rivals website, which has about 185,000 subscribers, pay about $10 (£5) a month to access information on results, drafts and scholarships. Yahoo"s sports section attracted more than 15 million visitors last year.