Complex sentence: Thomas Sørensen was then signed at the start of the 2008--09 season and so Simonsen played second fiddle to the Danish international throughout the year, playing only when Sørensen was injured, which amounted to just five appearances.
Split into simpler sentences: Thomas Sørensen was then signed at the start of the 2008--09 season, so Simonsen played second fiddle to the Danish international throughout the year. He played only when Sørensen was injured, which amounted to just five appearances.