Complex sentence: Unsettled, he quickly returned to Portugal and Académica; in his only season in his second stint he only scored six times, but ranked first in his team, which barely avoided top flight relegation.
Split into simpler sentences: Unsettled, he quickly returned to Portugal and Académica. In his only season in his second stint, he only netted six times, but ranked first in his team, which barely avoided top flight relegation.