Complex sentence: He made his professional debut for the club on 9 August 2015 in their opening fixture against Chesterfield, starting the match and playing 57 minutes as Barnsley lost 3--1.
Split into simpler sentences: He made his professional debut for the club on 9 August 2015 in their opening fixture against Chesterfield. He started the match and played 57 minutes as Barnsley lost 3--1.