Nationals sign Boone, Pena, Langerhans

Backup infielder Aaron Boone agreed to a one-year, $1 million contract Thursday with the Washington Nationals, who also avoided arbitration with outfielders Wily Mo Pena and Ryan Langerhans. Pena agreed to a deal that would pay him $4 million over two years if he picks up a mutual option for 2009, or $7 million if the team exercises its option.