Complex sentence: Cristian made his Football League Championship on 3 August 2013, coming on as a substitute in a 0--1 defeat at Nottingham Forest--in the process, he became the club's first ever Spanish player in its 105-year history.
Split into simpler sentences: Cristian made his Football League Championship on 3 August 2013, coming on as a substitute in a 0--1 defeat at Nottingham Forest. In the process, he became the club's first ever Spanish player in its 105-year history.