Complex sentence: Anderson was a goalkeeper during his playing days and had youth contracts with Wolves and Sheffield United before returning to Northern Ireland to play for Glentoran and Bangor where his playing career was ended by injury at age of 23.
Split into simpler sentences: Anderson was a goalkeeper during his playing days and had youth contracts with Wolves and Sheffield United. He went home to Northern Ireland to play for Glentoran and Bangor where his playing career was ended by injury at age of 23.