While there are rumors some big name players like tight end Fred Davis, receiver Josh Gordon, tailback Maurice Jones Dew and possibly defensive end Jared Allen are allegedly on the trade market, it would be highly unlikely that Miami (3-4) would make a second trade in one month.
The NFL typically has very little activity on trades because of the nature of the league's contracts. The majority of NFL contracts aren't guaranteed, so teams who want to unload a player typically just releases them.
However, this season has featured quite a few moves. Tailback Trent Richardson got traded from the Browns to the Colts. Left tackle Eugene Monroe got traded from Jacksonville to Baltimore, which made McKinnie available to Miami in last week's trade.
The Dolphins have roughly $19 million in available cap space, which will carry over to the 2014 season if it goes unused. If that's the case the Dolphins could have approximately $36 million to spend next offseason on free agents and the 2014 draft class.