Complex sentence: In mid August Michel Salgado became available on a free transfer after being released by Real Madrid and given Sam Allardyces previous experience of prolonging older players careers opted to join Blackburn.
Split into simpler sentences: In mid August, Michel Salgado became available on a free transfer after being released by Real Madrid. Given Allardyce's previous experience of prolonging older players careers, Salgado opted to join Blackburn.