Wednesday is the deadline for St. Louis, San Diego and Oakland to make their final pitches to the National Football League to keep their teams from moving to Los Angeles, but it appears only St. Louis will make a formal offer and Oakland will make an informal one. There was no report Tuesday afternoon as to whether San Diego would make a pitch. Earlier reports suggested it would be difficult for the city to retain the Chargers. According to the San Francisco Chronicle, Oakland city officials indicated Monday that they would not present a plan. Instead, they would send a letter to league officials updating them on the city’s efforts to persuade the Raiders to stay in town. Meanwhile, the Associated Press reported that a task force convened by Missouri’s governor pitched a plan to the National Football League to build a billion-dollar stadium along the Mississippi River to keep the Rams from leaving St. Louis.