The Facts: The Dolphins signed Packers TE Martin to a contract, a source said Sunday. Terms weren't immediately available.

Diehards Line:Martin is regarded as a quality receiver who has battled injuries throughout his first six NFL seasons in Green Bay. His arrival could be insurance if the team parts ways with tight end Randy McMichael, whose agent Drew Rosenhaus confirmed Sunday night is on the trading block. A source said Saturday that the Dolphins are asking for a third-round draft choice. The team is believed to owe McMichael a $3 million roster bonus next Monday.