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The Dallas Cowboys are discussing with the Detroit Lions a trade for wide receiver Roy Williams, a team source told ESPN.com Tuesday.

Cowboys owner Jerry Jones believes Williams is a game-breaker who provides an immediate boost to a faltering offense without quarterback Tony Romo and views him as a potential long-term solution as the eventual replacement for aging Terrell Owens, according to another high-ranking Cowboys source.

The source said the Cowboys are willing to make the deal, but the Lions seem hesitant because they are operating without a general manager. Former GM Matt Millen had discussed the possibility of trading Williams with the Cowboys frequently before he was fired.

The Lions have been demanding a first-round draft choice just to consider a deal, and it is not known if Jones is willing to make the trade at that compensation level. The Cowboys could offer a second- and third-round pick, since they have multiple choices in the third round.

Williams has expressed unhappiness playing for the winless Lions and can become a free agent after the season unless the team places the franchise tag on him.

ESPN's Chris Mortensen, attending the meeting of league owners, reported that the Cowboys' NFC East rivals the Philadelphia Eagles have also made inquiries about Williams' availability. While one GM said there was a strong possibility the Lions would trade Williams to the Cowboys or Eagles on Tuesday, Philadelphia is believed to be more interested in Kansas City Chiefs tight end Tony Gonzalez. The New York Giants and Green Bay Packers are also pursuing a deal with the Chiefs.

However, sources told ESPN's Michael Smith on Tuesday that it appeared very unlikely Gonzalez would be traded.

In Dallas, Jones is known for a failed deal in which he traded two No. 1 draft picks to the Seattle Seahawks for wide receiver Joey Galloway in an attempt to provide Troy Aikman one more chance at the Super Bowl.

The Cowboys would like to find a way to avoid the two- to three-season span it seems to take to develop a young receiver for that role. But the Cowboys are concerned about how Owens would react to the addition of another prominent receiver and the possibility it would diminish his role rather than provide him occasional single coverage. The potential negative effect on the overall offensive chemistry is also a concern and some in the organization prefer to wait until the offseason to make such a move.

Either way, Jones definitely wants him and there have been very few times in his two decades of ownership that the Cowboys have failed to acquire a player Jones covets like he does Williams.