Usually used for a bad, sloppy or
useless soccer player, particularly because of the stiff (
like a tree trunk) movement of their body. Examples of troncos are Diego Reyes, Maza Rodriguez , Kikin Fonseca and some even call Chicharito Hernandez a tronco because of his unorthodox ways of scoring goals. A tronco doesn't necessarily
mean that the player is unsuccessful, Hernandez being the perfect example.