Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Carlos Oliva is a Honduran football player that currently plays for Marathon. He previously played for Real España where he debuted on 21 February 1998 against Olimpia. He also played with Vida. A midfielder (or simply mid) 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.