Casadó, Riad, Txus, Barberà, Vega and Pelayo all trained with the first team on Friday
Barcelona coach Xavi Hernandez called up six players from Barça Atletico for training on Friday due to the club's long injury list.
Chadi Riad, Txus Alba, Román Vega, Barberà and Pelayo, in addition to Marc Casadó, who has been with the first team all week, took part in the session at the Ciutat Esportiva.
Barça are short on numbers after Andreas Christensen and Franck Kessie were added to the injury list this week.
Xavi was already without Hector Bellerin, Jules Kounde, Ronald Araujo, Frenkie de Jong and Memphis Depay for Tuesday's defeat to Inter Milan.
Of the injured players, De Jong and then Kounde are closed to comebacks, with Celta Vigo to come at Camp Nou in LaLiga on Sunday.
Barça then host Inter Milan in a must-win Champions League tie on Wednesday before traveling to Madrid next weekend.