Ruiz moves to Barca from Damm's Juvenil A team and will be registered with Sergi Barjuan's B team.
The 19 year-old was spotted by Barca scouts after impressing in a local Cup competition.
The Catalan was the Zamora del grupo III de la División de Honor Juvenil and broke a record this season after going 953 minutes without conceding a goal and ten consecutive games without conceding.
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