Armstrong played his last season for Los Angeles, and has also played for the New York Islanders, Ottawa Senators, and the New York Rangers. He was drafted by the Islanders in 1992. His best season was 2002-03 when he had 38 points.
Achievemnets 2000- AHL Second All-Star Team 2001- AHL First All-Star Team 2001- John P. Sollenberger Trophy (AHL Top Scorner) 2001- Les Cunningham Award (AHL MVP)