The San Diego Padres play closer to the Mexican border than any other U.S. team. They help their own international marketing efforts by playing in Mexico regularly, most recently on April 25-26 against the Arizona Diamondbacks. Although the Padres have no Mexico natives on their 40-man roster, that hasn't proved an obstacle to popularity for their star players. One Padre in particular seems to have captured the country's hearts. “Fernando [Tatis Jr.] here in Mexico is a rock star,” Santiago Harp, who runs the Mexico City Diablos Rojos, told the San Diego Union-Tribune . “He’s the biggest star of any team. I don’t think [Shohei] Ohtani would have the same impact as Tatis here in Mexico City.” The Diablos Rojos are owned by Harp's father, Alfredo Harp Helú, who owns the largest minority share of the Padres outside the Seidler family. Having a multi-country promotional engine can only help Tatis' star power. This season, it might even be necessary. Tatis has a .609 OPS through his first 30 games of the season.…