The NFL’s all-time leading rusher will no longer be a Cowboy. Running back Emmitt Smith will be released Thursday, ending his 13-year career in Dallas, two sources said. Smith, who turns 34 in May, has said he wants to remain a starter and would consider playing for other teams. The team has called a 2 p.m. news conference to make the announcement. Smith, dressed in a suit, arrived at the team's Valley Ranch headquarters at noon. Smith was scheduled to earn a base salary of $7 million in 2003 and count $9.8 million against the salary cap. Because Smith will...