2006-07: Andrew Hammond made his first BCHL appearance and spent most of the season playing lower tier midget hockey in British Columbia. He stopped 7 of 11 shots in 34 minutes of action for the Westside Warriors in his only BCHL game.
2007-08: Hammond began the year playing in his hometown with the BCHL's Surrey Eagles before a mid-season trade to Vernon. He was 15-14-1 with 2 shutouts in 32 games with the Eagles and had a 3.44 goals against and.898 save percentage. In nine regular season games with the Vipers he was 6-3 with 1 shutout and had a 2.45 goals against and .901 save percentage. Vernon finished fourth in the Interior Division. Hammond saw action in all seven playoff games against Penticton and was 3-3 with a 2.91 goals against and .908 save percentage.
2008-09:Hammond returned to Vernon for his second BCHL season — back-stopping the Vipers to the RBC Cup championship. He played in 43 regular season games and was 27-12-1 with 5 shutouts and had a 2.30 goals against and .912 save percentage. Vernon finished first in the Interior Division and captured the BCHL playoff title. Hammond was 12-5 with 4 shutouts in 17 playoff games with a 1.50 goals against and .946 save percentage. After sweeping Grande Prairie in the Doyle Cup the Vipers were 6-0 at the RBC Cup and shutout the Humboldt Broncos in the championship game. Hammond committed to playing college hockey at Bowling Green in 2009-10.
2009-10: Hammond went from the top team in Canadian Junior A hockey to one of college hockey's weaker teams in his freshman season at Bowling Green. Splitting time with junior Nick Eno, he appeared in 19 games for the Falcons and was 0-12-2 with a 4.30 goals against and .880 save percentage. Bowling Green finished 11th in the 12-team CCHA, winning just five games all season. Hammond started the Falcons first playoff game against Nebraska-Omaha and relieved Eno in the second game; both 6-1 losses.
2010-11: Hammond appeared in 27 games for Bowling Green as a sophomore. He was 6-17-3 with 2 shutouts and had a 2.67 goals against and .915 save percentage as the Falcons showed improvement under first year coach Chris Bergeron – finishing 10-27-4. After finishing last in the regular season, Bowling Green swept sixth-place Northern Michigan in the first round before falling to first-place Michigan in the CCHA tournament. Hammond recorded 29 saves in a 2-0 shutout win and stopped 44 shots in a 2-1 double overtime win in the two game series with Northern Michigan. He started both games against Michigan; being relieved with nine minutes left as the senior Eno made his final appearance with the Falcons.
2011-12: Hammond was a workhorse for Bowling Green in his junior season, appearing in all 44 games for the Falcons. He finished the year 14-24-5 with 2 shutouts and posted a 2.73 goals against and .903 save percentage. Bowling Green finished last but had an impressive run in the CCHA Tournament. The Falcons defeated Northern Michigan and Ferris State in back-to-back three game series before falling in double overtime to Michigan in the CCHA semifinal. Hammond stopped 55 of 58 shots in the 3-2 loss to the Wolverines.
2012-13: Hammond attended the Chicago Blackhawks' prospect camp before returning to Bowling Green for his senior season. Sharing time with freshman Tommy Burke, he played 29 games and was 10-15-3 with 3 shutouts and had a 2.47 goals against and .917 save percentage. The Falcons finished ninth in the final CCHA season and reached the playoff quarterfinals after defeating Lake Superior State in a first round series. Hammond stopped 35 of 36 shots in a 1-0 overtime loss to Notre Dame in the first quarterfinal game and made 30 saves in the 4-3 loss in Game 2. Hammond signed a two-year, entry-level contract with Ottawa in March of 2013.
Hammond signed with the Ottawa Senators in March of 2013, and will begin the 2013-14 season in either the AHL or ECHL.