Complex sentence: He was sober for 8 years after stints in rehab, until a relapse September 2010, when he had a fight with an Indianapolis club owner over a broken mirror and his band's pay.
Split into simpler sentences: He was sober for 8 years after stints in rehab, until a relapse September 2010. He had a fight with an Indianapolis club owner over a broken mirror and his band's pay.