Vernon Davis is seeking a five-year, $40 million contract from the 49ers. Rival tight end Antonio Gates became the richest tight end in NFL history by signing a new deal with the Chargers on Wednesday, which helps the case of Davis. Chronicle Live host Greg Papa asked Davis on Tuesday whether he expects to have a contract extension agreed upon before the start of the season. "I'm sure it'll get done, but I can't go into camp worrying about it," Davis said. "I have to move on and try to get better."