Orlando and Carreras set for Argentina duty
Orlando has been capped 47 times by Los Pumas, who are now under the tutelage of former Australia head coach Michael Cheika.
They face a summer test programme which sees a three-match series against Scotland, with games in Jujuy (July 2), Salta (July 9) and Santiago del Estero (July 16).
All three matches will be shown live in the UK on Sky Sports.
Carreras, meanwhile, is part of a 30-man ‘Argentina XV’ group for their two-match summer schedule, which sees them facing Georgia in Kutaisi on July 3 before meeting Portugal in Lisbon on July 9.
The 22-year-old winger has been capped five times by Los Pumas, scoring two tries.
Argentina then move into the Rugby Championship against New Zealand, Australia and South Africa, with that tournament running from August 6 until September 24.