Shortly into the Mariners' fourth Hyundai A-League season, Bosnich was welcomed to the Mariners’ playing roster for seven rounds of the Hyundai A-League 2008/09 season as the clubs first ever guest player. Bosnich's rare talents were first truly discovered and recognised by Australian audiences in the early to mid-nineties, when in his early twenties, Bosnich inspired English Premier League challengers Aston Villa to the their two greatest domestic triumphs of the past decade – the 1994 and 1996 English League Cup trophies. Bosnich replicated his form with Aston Villa at international level, where he was a standout for Australia in their quest for qualification for the 1994 and 1998 FIFA World Cups in the United States and France respectively – even netting a rare goalkeepers goal for the Qantas Socceroos from the penalty spot against the Solomon Islands in 1997. Following Australia’s near miss of qualification for France, Bosnich secured a high profile move to world football giants Manchester United, who installed Bosnich as the successor to club legend and fellow goalkeeping luminary Peter Schmeichel.