The San Diego Chargers, who have been proactive the past two years in signing core players to contract extensions, have locked up three-year veteran defensive lineman Ryon Bingham through the 2010 season with a new deal. Bingham, 26, signed a three-year extension on Christmas Eve before the Chargers' victory over the Denver Broncos. Financial details of the extension were not yet available. Without the extension Bingham would have been eligible for restricted free agency in the spring. He was in the final year of his original rookie contract and earned a minimum base salary of $435,000 for 2007.