[4] On March 27, 2009, Stoa forwent his senior year and signed a two-year, entry-level contract with the Colorado Avalanche.

[13] Assigned to AHL affiliate, the Hershey Bears, for the 2012–13 season, Stoa missed two-months to injury before returning to finish with 19 points in 46 games.

In 67 games, Stoa matched his career high 40 points from his rookie campaign and was recalled by the Capitals in the latter half of the season.

He made his debut with Washington, marking a return to the NHL after a two-year absence, in a 6–4 defeat to the Philadelphia Flyers on March 5, 2014.

[16] On July 15, 2014, Stoa opted to sign abroad as a free agent on a one-year deal with Russian club, Metallurg Novokuznetsk of the KHL.

[20] Following the 2017–18 season, his second with Spartak, Stoa left as a free agent to sign a one-year contract with his fourth KHL club, Traktor Chelyabinsk on May 23, 2018.

[21] After five well travelled seasons in the KHL, Stoa left Russia as a free agent, opting to continue his career in Sweden by agreeing to a one-year contract with Örebro HK of the SHL on July 15, 2019.

On June 30, 2021, Stoa left Sweden and signed a one-year contract with German club, Nürnberg Ice Tigers of the DEL.