 He played in the reserve-team alongside Nwankwo Kanu, Alberto Méndez, Jason Crowe and Kaba Diawara.His first goal for the reserve-team came in a 4–1 away defeat against Wimbledon on 4 November.Caballero would go on to score in the next three matches in a 3–3 home draw with Fulham (16 November), a 2–1 away victory against AFC Bournemouth (24 November) and a 2–0 home victory against Queens Park Rangers (30 November), totaling to a run of four goals in four consecutive matches.