Complex sentence: He signed a new three-year contract in March 2014, but remained a third or fourth-choice under new manager Luis Enrique, making 25 appearances and scoring once as the team won the treble in 2014--15.
Split into simpler sentences: He signed a new three-year contract in March 2014. He remained a third or fourth-choice under new manager Luis Enrique, making 25 appearances and scoring once as the team won the treble in 2014--15.