Complex sentence: The following season, he was promoted to the B squad, under Josep Guardiola, helping the team promote to "Segunda División B", with 31 appearances and two goals, although he was unable to appear in the play-offs because of injury.
Split into simpler sentences: The following season, he was promoted to the B squad, under Josep Guardiola. He helped his team qualify to "Segunda División B", with 31 appearances and two goals, but was unable to appear in the play-offs because of injury.