In a move to strengthen its social strategy of enriching, aggregating and distributing social content from across the web, Yahoo! has signed a definitive agreement to acquire Citizen Sports, a company that develops sports-related products for social networking sites and mobile devices.

Citizen Sports offers array of social and mobile products to play fantasy sports, fill out brackets, check live scores and read up-to-the minute news on sports including football, hockey, soccer, baseball, racing, rugby, hockey and cricket.

Yahoo! Sports’ content is expected to be integrated into these products. Yahoo! expects the integration to transform it into a more personally relevant experience, drive deeper user engagement and create opportunities for advertisers to interact with audiences in new environments.

Bryan Lamkin, senior vice president of consumer products group at Yahoo!, said: “Yahoo! is in a unique position to combine our deep expertise in content and aggregation technology to offer a highly personalised social experience.

“Sports has been among the earliest online categories to experience rapid social proliferation, and the combination of Citizen Sports leading products with our world-class sports experience on Yahoo! Sports is a win-win for sports fans globally.”

Yahoo! expects to complete this acquisition in the second quarter of 2010. Financial terms were not disclosed.