|Full name||Davy Lee Armstrong|
|Date of birth||November 3, 1991|
|Place of birth||Aurora, Colorado, United States|
|Height||5 ft 10 in (1.78 m)|
|Colorado Springs Switchbacks|
|2013||→ Phoenix FC (loan)||2||(0)|
|2015–||Colorado Springs Switchbacks||41||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of October 1, 2016.
Armstrong was born and raised in Aurora, Colorado, the youngest of four children to Ri and Laura Armstrong. His father was originally from Cambodia but came to the United States during the Vietnam War.
He played soccer at Rangeview High School where he was named the 2008 Denver Post All-Colorado player of the year and was a three-time All-Colorado team selection from 2007-09. He also led his club team – Rapids adidas Alliance partner, the Colorado Fusion – to the 2005 Colorado state championship.
He entered the Colorado Rapids youth system in 2007, playing with the team's U-17 and U-18 squads.
Armstrong signed a contract with the Colorado Rapids on Aug. 16, 2010. He was identified by the club as a homegrown player – an initiative established by Major League Soccer to allow clubs to develop their own youth players without exposing them to the MLS SuperDraft. Davy made his debut against Metapan in El Salvador in a 3-1 victory for Colorado Rapids, coming on as a substitute for Eddie Ababio.
Colorado Springs Switchbacks FC
On February 4, 2015 it was announced that Armstrong was going start playing for USL Pro team Colorado Springs Switchbacks FC, he was the 10th player announced for the Colorado Springs Switchbacks FC 
In 2011, Armstrong was identified by the Football Federation of Cambodia as a foreign-born player who could potentially be called for the Cambodia national team. He qualifies through his Cambodian father who immigrated to the United States during the Vietnam War.
- "Aurora's Davy Armstrong blazes trail for Colorado Rapids". AsiaXpress.com. Retrieved September 23, 2010.
- "Best of the Best: Boys soccer". The Denver Post. December 4, 2008. Retrieved August 21, 2010.
- "Rapids Academy Develops First Pro Player". ColoradoRapids.com. Retrieved August 21, 2010.
- "Rosters". Major League Soccer. Retrieved March 28, 2012.[permanent dead link]
- Ung, Chamroeun. "Chamroeun Ung of the Phnom Penh Post details three players of Cambodian heritage who could make an impact in the coming years on the country's developing national team". Goal.com. Retrieved 17 October 2015.