2007-08: Greg Carey skated for the Burlington Cougars in the Ontario Provincial Junior Hockey League as a 17-year-old. He scored 10 goals with 12 assists and had 16 penalty minutes in 46 games. Carey had no points nor penalties in three playoff games.
2008-09: Carey returned to Burlington for his second season with the Cougars. He scored 31 goals with 34 assists and 24 penalty minutes in 45 league games. The Cougars finished third in the MacKinnon Division. Carey scored 5 goals with 5 assists and 22 penalty minutes in eight playoff games. He committed to playing college hockey at St. Lawrence in 2010-11.
2009-10: Carey was a team captain for Burlington in his third season with the Cougars and played for Canada East in the 2009 U19 World Junior A Challenge. He set a league goal scoring record with 72 goals in 48 regular season games. Joined briefly by his younger brother Matt Carey, who played five games with Burlington before being traded to the Hamilton Red Wings, Greg Carey had 42 assists, finishing with 114 points (two points behind team leader Josh Jooris (CGY). Carey scored 7 goals with 4 assists and was +7 with 13 penalty minutes in ten playoff games as the Cougars reached the CCHL Frozen Four before being swept by Newmarket. Carey scored 1 goal with 1 assist and 4 penalty minutes in four games four Canada East at the WJAC.
2010-11: Carey skated in all 40 games and was St. Lawrence University's leading scorer as a freshman. He scored 23 goals with 17 assists and was -7 with 24 penalty minutes. The Saints finished 11th in ECAC Hockey but defeated Princeton in a first round series and took Yale to three games in the ECAC Hockey quarterfinals.
2011-12: Carey led the Saints in scoring for the second straight year in his sophomore season — finishing with a team-high 15 goals — sharing the points lead with junior Kyle Flanagan (FLA) with 22 assists and 37 points. St. Lawrence finished eighth in ECAC Hockey before falling to Dartmouth in a three-game first-round playoff series.
2012-13: Carey led St. Lawrence in scoring for the third straight season; breaking the 50-point mark for the first time in his college career. In a year of transition as first-year coach Greg Carvel succeed long-time Saints coach Joe Marsh, Carey scored 28 goals with 23 assists and was +3 with 38 penalty minutes in 38 games. St. Lawrence tied Dartmouth for fifth in ECAC Hockey during the regular season and swept Colgate in a first round series before falling to eventual national champion Yale in a two-game quarterfinal series.
2013-14: Carey, joined on a line by his younger brother Matt Carey, was the third-leading scorer in college hockey in his senior season and made his pro debut with the AHL's Portland Pirates after he was signed by Phoenix to a one-year entry-level contract on March 19th, 2014. In his first eight games with Portland he had 1 assist and was -6 with 4 penalty minutes. Carey scored 18 goals with 39 assists and was -2 with 39 penalty minutes in 38 games for St. Lawrence. The Saints finished eighth in ECAC Hockey and swept Brown in a first round playoff series before falling to Colgate in the ECAC quarterfinals.
Phoenix signed Greg Carey to a one-year entry-level contract on March 19th, 2014.