Hamilton made 107 starts in center field in 2008, with the total dropping to 55 starts in 2009 and 29 last season. Hamilton missed most of the final month for the AL champions after breaking two ribs when he ran into an outfield wall. Hamilton was in center throughout the playoffs and World Series.
Washington said Monday that speedy Julio Borbon could take over the spot next year.
Hamilton hit .359 with 32 home runs and 100 RBIs.