 He played two games with the San Jose Sharks of the National Hockey League (NHL) as a forward during the 2008–09 season.Armstrong was born in Lloydminster, Saskatchewan, but grew up in Saskatoon, Saskatchewan.He attended Sacred Heart High School in Yorkton, Saskatchewan for grade 11 and 12 while playing AAA Midget, and also St. Joseph High School in Saskatoon with his brother Colby Armstrong, who also played in the NHL.