signed a definitive agreement to acquire, a Web site that provides information on college sports, high school athletics and recruiting.

Financial terms weren't disclosed.

"Yahoo!'s acquisition of exemplifies Yahoo!'s mission to connect people with their passions, communities and the world's knowledge," said Scott Moore, senior vice president and head of news and information at Yahoo!. "Among the more than half billion people who touch the Yahoo! brand every month, we find that sports fans are among the most passionate. We're now best-positioned to serve this important audience in the U.S."

Rivals is primarily focused on football and basketball. The company maintains a network of more than 150 individual Web sites, which attract around 2 million fans each month. Rivals was founded in 2001 and is based in Brentwood, Tenn.