The Chargers retained UFA kicker Christie, signing the 12-year veteran to a one-year contract Friday night. Christie was initially signed to a one-year deal late last year after he was released by Buffalo on the eve of the regular-season opener. He spent much of the season rehabilitating a groin injury and then joined the Chargers when incumbent Wade Richey struggled. The one-year contract includes a base salary of $750,000.