The Mesoamerican ballgame is among the oldest continuously practised sporting traditions in human history, attested in the archaeological record from at least 1600 BCE and surviving today in the living variants of ulama, pelota mixteca, and uárhukua played in the fields of Sinaloa, Oaxaca, Michoacán, and the diaspora communities of California and the American Southwest. Known in Nahuatl as ōllamalīztli and in Classic Maya as pitz, the game was played with a heavy solid rubber ball on monumental masonry courts — over 2,300 of which have been identified across the Mesoamerican landscape — and served simultaneously as athletic contest, cosmological theatre, mechanism of conflict resolution, and stage for ritual sacrifice. The Popol Vuh, the foundational K'iche' Maya narrative, places the ballcourt at the threshold between the terrestrial world and Xibalba, the underworld: the Hero Twins defeat the Lords of Death by their skill with the rubber ball, and in doing so resurrect the Maize God, enacting the cycle of planting, death, and agricultural rebirth. The Academy hosts the Mesoamerican ballgame as a Body School discipline because its essential knowledge is carried in the hips and the breath — in the fajado-armoured strike of a four-kilogram rubber ball, in the felt geometry of a narrow earthen taste. It is honour-system by design: the game lives where it has always lived, in the body of the player.