NBL Petrie made his debut in the
National Basketball League (NBL) for the
West Sydney Razorbacks during the
2007–08 season. For the
2008–09 NBL season, he joined the
Wollongong Hawks. Between 2009 and 2012, Petrie played for the
Gold Coast Blaze. Three games into the
2010–11 season, he suffered a season-ending Achilles tendon rupture. Between 2012 and 2016, Petrie played for the
Adelaide 36ers. Between 2016 and 2018, Petrie played for the
Brisbane Bullets. He damaged the same knee again during the
2017–18 season and subsequently had one last knee operation in November 2017 to see him through the season. He retired from the NBL in February 2018.
State Leagues Petrie debuted in the
South East Australian Basketball League (SEABL) in 2003 with the
Canberra Gunners, helping the team win the East Conference title. He played four more seasons with the Gunners between 2005 and 2008. In 2010, Petrie played for the Northside Wizards of the
Queensland Basketball League (QBL). In 2012, he had a one-game stint in the SEABL with the Brisbane Spartans, and in 2013 he played for the
North Adelaide Rockets in the
Central ABL. His first
Australian Boomers call-up came just shy of his 30th birthday, with Petrie playing against
China in the 2013 Sino-Australia Challenge. This led to selection in the Boomers team for the
2013 FIBA Oceania Championship. ==Coaching career==