"Trying to acquire A's left-hander Gio Gonzalez is the Nationals' top priority, according to a baseball source. The clubs are trying to work out a deal that would send four players to Oakland, and it is believed that Gonzalez will be traded soon.

Two of the players the A's are looking at are right-hander Brad Peacock and catcher Derek Norris.

Peacock is arguably Washington's best pitching prospect. He went a combined 15-3 with a 2.39 ERA for Double-A Harrisburg and Triple-A Syracuse this year. Peacock was promoted to the big leagues late in the season and allowed one run in 12 innings. "