Special teams standout Kassim Osgood agreed to a four-year contract with the San Diego Chargers on Friday. Osgood was one of the AFC's most dominant special teams players last season until he tore a pectoral muscle Dec. 4. At the time, he was leading the Chargers with 19 tackles on special teams. He finished second behind Hanik Milligan, who had 21 and was voted to the AFC Pro Bowl squad as the conference's top special teams performer.