2018 (D.C. United): In his first year with D.C. United, Mora proved to be a valuable member of the backline for United. The Costa Rican made 30 appearances (28 starts), ranking third on the team for regular season games played. The defender tallied his first assist for the Black-and-Red on May 26 against LAFC; he added another assist against Minnesota United on September 12. The defender played in United’s final 21 matches in a stretch that saw the team go 12-4-5. Mora finished the 2018 season ranked third in minutes played with 2,523 and led the team in tackles with 64.
2011-2017 (Costa Rica): Mora started his professional career with Guadalupe FC in the Costa Rican top division. In two stints with the club (2011-2012, 2013-2015), he made 61 appearances for Guadalupe, scoring one goal and recording an assist. He Spent the 2012/2013 season with CS Uruguay de Coronado and made 11 appearances for the club. Deportivo Saprissa signed Mora on Feb. 5, 2015 and went on to make 83 appearances for the Costa Rican club, scoring one goal and recording two assists.
2015: Mora appeared for the Costa Rican Youth National Team in the 2015 CONCACAF Men’s Olympic Qualifying Championship as an Under-23 player, making appearances in all three group stage matches. He also appeared in the 2015 Toulon Tournament.
2014: Appeared in the 2014 Central American and Caribbean Games.
2011: Appeared in FIFA Under-20 World Cup, and CONCACAF Under-20 Championship.
2009: Appeared in Under-17 FIFA World Cup.
March 7, 2018: Acquired Joseph Mora on a permanent transfer pending receipt of his P1 Visa and International Transfer Certificate