The Nationals, according to multiple people with knowledge of the situation, traded slugger Michael Morse to the Seattle Mariners in a three-way trade that netted them right-hander A.J. Cole, the pitching prospect who last winter served as the centerpiece of the trade that brought Gio Gonzalez from the Oakland A's to the Nationals. The Mariners sent catcher John Jaso to the Oakland to complete the deal.

The Nationals had been in discussions to trade Morse for weeks, talks that intensified last week once the Nationals re-signed first baseman Adam LaRoche. With LaRoche in the fold and their outfield full, Morse became expendable. Morse has one year remaining on his contract and will make $6.75 million this season.