Complex sentence: Blackburn Rovers signed him on a free transfer, making use of the, then recent, Bosman rulinge signed for 1.1 billion drachmas, a record amount for Greek players at the time.
Split into simpler sentences: Blackburn Rovers signed him on a free transfer, making use of the, then recent, Bosman rule. He signed for 1.1 billion drachmas, a record amount for Greek players at the time.