Answer: nats

AnswerCrossword Clue
NATSWashington nine, briefly
NATSMLB team from D.C.
NATSNickname for a D.C. team
NATSWashington squad, briefly
NATSOpponent of the O's in the "Beltway Series"
NATSTeam once known as the Expos, to fans
NATSD.C. ballplayers
NATSD.C. squad
NATSDC ball club
NATSDC ballplayers
NATSWashington ball team, briefly
NATSN.L. East nine
NATSD.C. team that clipped Clippard from its roster this year
NATSRival of the O's
NATSSinger Cole et al.
NATS2012 N.L. East champs
NATS2014 N.L. East champs
NATSWashington MLB team
NATSD.C. sports group
NATSMets' rival
natsmale given name, form of Nathan or Nathaniel
NATSD.C. baseball team
NATSTurner and Hiken
NATSEx-Washington baseballers, for short
NATSTurner and Cole
NATSCole and Turner
NATSWashington nine, for short
NATSPesky-sounding DC team
NATSD.C. nine
NATSNL East team, affectionately
NATSCole and others
NATSTurner and Hentoff
NATSExpos, since 2005
NATSRFK Stadium team
NATSD.C. ball team
NATSWashington team
NATSD.C. team
NATSWashington team, familiarly
NATSN.L. East squad
NATSExpos, now