The Mariners added some much-needed power to their lineup Wednesday, acquiring Michael Morse from Washington in a three-team deal that moved catcher John Jaso from Seattle to Oakland. The NL East champion Nationals reacquired pitching prospect A.J. Cole, dealt from Washington to Oakland 13 months ago in the trade for Gio Gonzalez. Washington also got minor league pitcher Blake Treinen and a player to be named.
