 Llorente spent several seasons in the various junior levels of the club, playing alongside Fernando Amorebieta and moving to their farm team Basconia in Tercera División in 2003.He gradually improved, leading to promotion to Bilbao Athletic – Athletic's reserves – in Segunda División B.After scoring four goals for the B's in the first half of the season, Llorente was rewarded with a contract extension until June 2008.