For a second successive season within the Capitals organization, Stoa was assigned to the Bears to begin the 2013–14 season. 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. In his three-game stint with the Capital, Stoa was scoreless. 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. In his debut season, Stoa established himself amongst the forwards, contributing with 15 goals and 30 points in 60 games. He was signed to a one-year extension during the 2014–15 season on February 27, 2015. In the following 2015–16 season, Stoa was elevated to the leadership group amongst Metallurg. Despite the club languishing in the standings, he was leading the club with 15 goals in just 33 games before he was traded to Neftekhimik Nizhnekamsk for financial considerations on November 21, 2015. Following the 2015–16 season, he transferred from Nizhnekamsk to fellow KHL team HC Spartak Moscow. 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. 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. As a free agent heading into the start of the 2020–21 season, Stoa opted to remain in the SHL, signing with HV71 on December 2, 2020. After 11 scoreless games with HV71, Stoa was released from his contract and transferred to fellow SHL club, Djurgårdens IF. He made 13 appearances, posting 3 goals and 8 points, before leaving the club following a first-round playoff exit. On June 30, 2021, Stoa left Sweden and signed a one-year contract with German club, Nürnberg Ice Tigers of the DEL. International play A part of the U.S. development program, Stoa was named to the United States Team for the 2005 U18 World Championships. Using his imposing frame, Stoa recorded 3 assists in 6 games to help the U.S. capture