Question: when did the montreal expos become the washington nationals
Answer: since 2005 Team logo Cap insignia Major league affiliations National League ( 1969 -- present ) East Division ( 1969 -- present ) Current uniform Retired numbers 42 ( as Montreal Expos : 8 10 10 30 ) Colors Red , navy blue , white Name Washington Nationals ( 2005 -- present ) Montreal Expos ( 1969 -- 2004 ) Other nicknames Nats Ballpark Nationals Park ( 2008 -- present ) Robert F.