Nats’ top prospect Lucas Giolito will attend his first big league spring training camp. (John Minchillo/Associated Press)

Although most names were known, the Nationals formally announced their list of non-roster invitees to big league spring training. These are players signed to minor league deals or who are minor leaguers that have been invited to take part in big league camp.

For some, it is a chance to experience a big league clubhouse and spring training games, such as Nationals’ top prospect Lucas Giolito, who will be in his first big league camp, and Austin Voth, the organization’s minor league pitcher of the year in 2015. For some, it is a chance to make an impression and perhaps fight for a spot on the opening day roster, such as veteran starter Bronson Arroyo or outfielder Chris Heisey, both long familiar with new Manager Dusty Baker.

The Nationals extended 20 such big league camp invitations, listed below. In total, the Nationals will have 60 players in big league spring training; 29 position players and 31 pitchers. Pitchers and catchers must report to Viera by Thursday.

PITCHERS (11)

RHP Bronson Arroyo

RHP Michael Brady

LHP Sean Burnett

RHP Erik Davis

RHP Paolo Espino

RHP Lucas Giolito

RHP Taylor Hill

LHP Aaron Laffey

RHP Nick Masset

RHP Wander Suero

RHP Austin Voth

CATCHERS (1)

RHH Jhonatan Solano

INFIELDERS (4)

RHH Jason Martinson

RHH Brendan Ryan

RHH Scott Sizemore

LHH Matt Skole

OUTFIELDERS (4)

LHH Tony Campana

RHH Chris Heisey

RHH Reed Johnson

LHH Logan Schafer