Complex sentence: His brother, David, was also a midfielder who played in the lower divisions for clubs including Chester City, Bury and Rochdale, and who was the manager of Barnsley and is the current manager of Bury.
Split into simpler sentences: His brother, David, was also a midfielder who played in the lower divisions for clubs including Chester City, Bury and Rochdale. He was the manager of Barnsley and is the current manager of Bury.