Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Gerson Elías Acevedo Rojas (born April 5, 1988) is Chilean footballer, who currently plays for Russian club FC Mordovia Saransk. He belonged to Colo-Colo where he made his professional debut in 2006. Colo-Colo loaned him after the 2007 year to newly descended club, Puerto Montt. He has represented the Chilean national team at the Under-17 and Under-20 levels. Association football, commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball. At the turn of the 21st century, the game was played by over 250 million players in over 200 countries, making it the world's most popular sport.