Jason joins Alaves in a permanent deal, signing a contract to 2025. The transfer includes a 30 per cent sell-on clause.
The winger has played five times for VCF this season.
Jason, while he played for VCF coach Jose Bordalas at Getafe, struggled for action this term and was moved on to help free up room on the wage bill.
The Galician player will be presented in the next few days in Vitoria.
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