There was widespread speculation that Sanders' retirement was a calculated move on his behalf to orchestrate a trade to a more legitimate contender.[citation needed] The Green Bay Packers and Miami Dolphins were both considered among the front runners in the negotiations. Sanders and Dolphin quarterback Dan Marino reportedly[by whom?] both expressed a private interest in finishing their careers together (Marino never had the benefit of a premier running back behind him) and try to win a Super Bowl. However, Detroit was either unable to find an attractive enough offer, or unwilling to negotiate altogether with other teams. It had been a long standing practice for the Detroit Lions to not accommodate players' requests for trades.
http://en.wikipedia.org/wiki/Barry_Sanders