While Brazilian heavyweight Antonio “Pezao” Silva shares a last name with Anderson, Wanderlei and Erik, they are of no relation.  His in-ring nickname, “Bigfoot”, comes from his size and pronounced facial features, both results of his battle with acromegaly, a disease involving tumors on his pituitary gland that cause an overabundance of growth hormone to”¦The post UFC 160 Fighter Profile: Antonio “Bigfoot” Silva appeared first on Fighters.com.