MLB Trade Rumors has posted an updated version of the Elias Sports Bureau's free agent rankings, and there's an important development there for the Nationals: Adam Dunn could be a Type B, not a Type A, free agent.
Essentially, that would mean the Nationals would only get one compensatory pick if they offered Dunn arbitration and he left in free agency, as opposed to two if the same scenario occurred with Dunn as a Type A.
If he is a Type A, they would get a "sandwich" pick and the first-round pick of whichever team signs Dunn (unless the pick is in the top 15).
If Dunn is a Type B, there's no penalty to another team for signing him. That might increase the likelihood that another team would sign Dunn and could also increase the likelihood the Nationals offered him arbitration.
General manager Mike Rizzo said after the trade deadline that the Nationals would consider "every option" with Dunn, including offering him arbitration.
They'd be in line for less compensation, though, if he left as a Type B free agent than a Type A. Of the offseason developments concerning the Nationals, this is one of the more interesting ones to wach.