An announcement was expected to be made as early as Monday. The move is considered a promotion for Brown. Anthopoulos and Brown have known each other since their days with the Expos. In fact, it was Brown who hired Anthopoulos to work in Montreal's scouting department in 2002.
Earlier last week, the Blue Jays received permission from the Nationals to talk to Brown, who is credited for drafting pitchers Stephen Strasburg, Jordan Zimmermann and John Lannan.
Brown, general manager Mike Rizzo, and team president Stan Kasten were not available for comment on Sunday.
According to a baseball source, assistant scouting director Kris Kline will most likely be promoted. The Nationals are also talking to Braves scouting director Roy Clark.
The Nationals also relieved Moose Stubing of his duties as special assistant to the general manager.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.