Joseph Martín Mora Cortéz (born 15 January 1993) is a Costa Rican footballer who usually plays as a defender. He currently plays for D.C. United of Major League Soccer.
Mora made his senior debut with Belén in Costa Rica, at the end of the 2011 Invierno. He finished the year with 15 appearances, including a run of 11 starts in the Verano tournament. After the season, Mora moved to C.S. Uruguay, who were promoted from the second division. He made 10 appearances in the Invierno as Uruguay finished three points from qualifying for the second stage, but made just one appearance in the Verano and returned to Belén after the season. The 2013–14 season would be his best with Belén, as he made 34 appearances with the club, including 21 out of 22 in the Invierno.