The Dodgers are headed to Mexico next season. The Dodgers and San Diego Padres will play a three-game series May 4-6 in Monterrey, Mexico, according to a person familiar with the matter but not authorized to discuss it publicly. An announcement is expected Monday. The Padres will be the home team. The series in Monterrey replaces one the Dodgers and Padres had been scheduled to play in San Diego that weekend. The regular-season series is the first of six that Major League Baseball plans to play in Mexico over the next four seasons, part of a dramatic expansion in international play.