Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Jaime Ruiz Dorado (born December 24, 1975, in Culiacán, Sinaloa) is a football attacking midfielder, who currently plays with Monarcas Morelia in Primera División de México. Ruiz made his debut on August 19, 1999 in a 2-1 loss against Pachuca. A midfielder is an association football position. Some midfielders play a more defensive role, while others blur the boundaries between midfielders and forwards. The number of midfielders a team uses during a match may vary, depending on the team's formation and each individual player's role. The group of midfielders in a team is called the midfield.