The deal is for one-year at $13 million and is pending a physical, said the sources.
The Los Angeles Angels previously tried to trade Haren to the Chicago Cubs for Carlos Marmol in early November, but the deal fell through. Afterward the Angels declined to pick up his $15.5 million option, giving him a $3.5 million buyout.
Rosenthal also mentioned that the $13 million that Haren will make this year will actually be more than what he would have made had the Angels picked up his option.
With Haren coming into Washington, the Nationals now have added a fifth starter to what was already one of the best rotations in the National League.
Stephen Strasburg, Jordan Zimmermann, Ross Detwiler, Gio Gonzalez, and now Haren will likely carry the Nationals to a lot of wins this upcoming season, which will be aided by one of the better offenses in the National League.
The Nationals finished in the top five in runs scored, hits, doubles, home runs, RBIs, batting average, and slugging percentage.
As a pitching staff, teams only batted .237 against them. They recorded the National League’s lowest ERA at 3.33 and had the third most cumulative strikeouts. Gonzalez recorded the most wins in the National League while he and Zimmerman both recorded sub .300 ERAs.
Haren finished last year with 12 wins and a 4.33 ERA with the Angels, which followed a 16 win season and a much more respectable 3.17 ERA in 2011.
Washington will be Haren’s fifth team and he has a 119-97 career record in the major leagues.