Complex sentence: In May 2005, he joined Hull City for £25,000, before joining Grimsby Town just eight months later in January 2006, before retiring at the end of the 2006--07 season.
Split into simpler sentences: In May 2005, he joined Hull City for £25,000, before joining Grimsby Town just eight months later in January 2006. He retired at the end of the 2006--07 season.