Complex sentence: Before the end of the 1986 NSWRL season, O'Connor signed with the Bob Fulton coached Manly-Warringah from 1987 and starred in their 18-8 Grand Final win over the Canberra Raiders in the last ever Grand Final played at the SCG.
Split into simpler sentences: Before the end of the 1986 NSWRL season, O'Connor signed with the Bob Fulton-coached Manly-Warringah club. O'Connor started playing for Manly from 1987 and starred in their 18-8 1987 NSWRL season's Grand Final win over the Canberra Raiders in the last ever Grand Final played at the SCG.