Complex sentence: He was named as an unused substitute against Bradford City on 9 August 2011 and made his debut four days later after coming on as a substitute for Robert Snodgrass in Leeds' 1--0 loss against Middlesbrough.
Split into simpler sentences: He was named as an unused substitute against Bradford City on 9 August 2011. Thompson made his Leeds United debut coming on as a substitute for Robert Snodgrass in Leeds' 1--0 loss against Middlesbrough.