28 years after former Canadian national champion Bruno Pauletto won gold at the 1982 Commonwealth Games Armstrong succeeded in reiterating that performance at the 2010 edition of the Games, placing first with a Commonwealth record of 21.02 m. At the 2010 World Indoor Championship, in Doha, Qatar, Dylan placed fourth with a Canadian indoor record of 21.39 m. He improved his outdoor national record to 21.58 m at the Askina Meeting in Baunatal, Germany, beating Ralf Bartels to the victory. When in 2014 Andrei Mikhnevich was stripped of the event's silver medal for doping violations, Armstrong moved up to the bronze medal position.