Perhaps the most notable features of the sculptures – and a clue as to their meaning – are the helmets worn by all the Olmec heads. These helmets, and the rubber balls found near the sculptures, may be evidence that the Mesoamerican ball game originated with the Olmec civilization. The Mesoamerican ball game was a team sport with profound religious and cultural significance for the indigenous people of Mexico and Central America. The Olmec heads were once thought to have represented Mesoamerican ball players who were sacrificed after losing a match. The current theory, however, is that the heads honor Olmec rulers.