Armed with extra draft picks in the first and fourth rounds of the April draft, the Denver Broncos are searching for potential deals. Two sources in the league said Monday that Broncos coach Mike Shanahan has made informal inquiries about Green Bay Packers receiver Javon Walker. Those discussions have included former Packers coach Mike Sherman, who is now on the Houston Texans staff. Shanahan could not be reached for comment. Walker, who publicly has threatened to retire instead of play for the Packers again, is under contract to Green Bay for the 2006 season, during which he is scheduled to count $1,165,000 against the salary cap.