The Rams have signed second-round draft pick Jacoby Shepherd to a four-year contract. Shepherd is a cornerback expected to compete for a job as a backup. The Rams’ have two picks still unsigned: top pick Trung Candidate, a running back, and third-rounder John St. Clair, an offensive lineman. The Rams are also trying to reach deals with veterans Kurt Warner, Kevin Carter, and Todd Lyght. The team opens training camp Friday in Macomb, Illinois.