What was depicted in Olmec sculpture?

Question

Olmec=Mother Culture

Answer 1

One theory is that they depict sporting heroes.

Answer 2

Picture is worth a thousand words. So here are pictures of La Venta, the park in Villahermosa, Mexico which preserves many Olmec sculptures.
http://www.delange.org/LaVenta/LaVenta.htm
http://www.csmonitor.com/2003/0924/p12s02-altr.html?entryBottomStory

Much of Olmec sculpture depicted large heads. Some resembled African Americans, and this has led anthropologists to speculate that Africans may have visited ancient Mexico by crossing the Atlantic around 1000 AD.