Complex sentence: He signed his first professional contract for the club in July 2012 and made his professional debut on 3 November 2012, in a 4--1 defeat to Crewe Alexandra in the FA Cup, coming on as a substitute for Anthony Stewart.
Split into simpler sentences: He signed his first professional contract for the club in July 2012. He made his professional debut on 3 November 2012, in a 4--1 defeat to Crewe Alexandra in the FA Cup, coming on as a substitute for Anthony Stewart.