Please note that the content of this book mainly consists of articles that are available online from Wikipedia or other free sources. Humberto Gabriel Hernández López (born July 20, 1985, in Ciudad Nezahualcóyotl) is a Mexican football player. He currently plays for C.F. Ciudad Juárez. He is nicknamed "el bola" by his teammates. In football, the goalkeeper occupies a position that serves as the last line of defense between the opponent's attack and his own team's goal. The primary task of the goalkeeper is to defend his team's goal and prevent the opposing team from scoring. The goalkeeper is the only player allowed to touch the ball with his hands or arms within his own penalty area during open play. Each team is required to have a goalkeeper on the field at all times during a match. If a goalkeeper is forced to leave a game due to injury or...