Green began learning to skate in 2009 because he was interested in playing ice hockey.[1][3] He teamed up with his sister in August 2009[2] and joined the Wheaton Ice Skating Academy in September.[4] The siblings took gold in the juvenile category at the 2013 U.S. Championships and won the intermediate title at the 2014 edition.
Having become age-eligible for junior international events, the Greens made their ISU Junior Grand Prix (JGP) debut, winning bronze in Riga, Latvia, and Gdańsk, Poland. They finished as third alternates for the JGP Final.
The Greens concluded the season at the 2019 World Junior Championships. In the rhythm dance, Caroline stumbled during the tango pattern dance segment, leading to an eighth-place finish. They improved in the free dance, moving up to seventh place.[6] Following the end of the competitive season, Gordon opted to retire from competitive ice dance to focus on academics. Caroline subsequently formed a new partnership with Michael Parsons.[7]