Complex sentence: Raven was added to the first team squad at Doncaster Rovers in 1988, and in his first season with Rovers he played well enough to earn himself a transfer to West Bromwich Albion.
Split into simpler sentences: Raven was added to the first team squad at Doncaster Rovers in 1988. After his first season with Rovers, he moved to West Bromwich Albion.