Former No. 2 overall pick Leonard Davis became the richest offensive lineman of this year?s free-agent class when he agreed to a seven-year, $49.6 million contract with the Cowboys on Sunday. The deal eclipses the seven-year, $49.5 million pact that Eric Steinbach received from Cleveland on Friday. The plan for Davis, who spent the first six years of his career with Arizona, is to play either right tackle or right guard for the Cowboys. Dallas is trying to re-sign right tackle Marc Colombo. If the Cowboys do that, Davis will play right guard.