 However, after a serious injury to Doblas, he was called up from the reserves; after Ricardo also went down with a minor ailment, he made his debut in La Liga on 16 December 2007, against UD Almería in a 3–1 home win.In March/April 2008 Casto, who eventually overtook Ricardo as first-choice after the latter's recovery, featured in Betis' first three back-to-back victories in over two years, with wins over CA Osasuna, FC Barcelona and Real Zaragoza.In his first five games they won four, with the player keeping clean sheets in three.