 In Round 14 of the 1991 season, Coyne became the first player to score a try on the famous Adelaide Oval in the first NSWRL premiership match played in South Australia.On a cold and wet night in June, the Dragons defeated the Balmain Tigers 16-2 in front of 28,884 fans, the largest attendance of the 1991 minor round.In 1992 Coyne played in the Dragons 28-8 Grand Final loss to the Brisbane Broncos.