Complex sentence: Watts began his professional career at Fulham however he never went on to make a first team appearance for Fulham although in the Carling Cup match against Shrewsbury Town he was an unused substitute.
Split into simpler sentences: Watts began his professional career at Fulham; however, he never went on to make a first team appearance for Fulham. Yet, in the Carling Cup match against Shrewsbury Town, he was an unused substitute.