In 2004, the state of Puebla welcomed in Tigres who played in the same ballpark as Pericos. Fans from Puebla (city) quickly began cheering for Tigres while people from around the state continued supporting Pericos. The rivalry between the two clubs became known as the Civil War in Puebla. Pericos finished the season with a 63–34 record. In the quarterfinals they managed to knock off Aguascalientes in 6 games. In the semifinals the club lost the series to Saraperos de Saltillo in 6 games.