Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Válber Mendes Ferreira or simply Válber (born September 22, 1981 in São Luis), is a Brazilian attacking midfielder. He currently plays for Daejeon Citizen.In the sport of association football, each of the eleven players on a team is assigned to a particular position on the field of play. A team is made up of one goalkeeper and ten outfield players who fill various defensive, midfield and attacking positions depending on the formation deployed.