49ers rookie RB Marcus Lattimore (ACL, PCL, LCL surgery) resumed running sprints two weeks ago and has been doing jumping drills. He'll resume agility work in "a few weeks" and has experienced "no setbacks." Lattimore anticipates being able to put on pads "in three to four months." NFL training camp begins in three months. "Whatever is best for my career or future, I'm good with it," Lattimore said. "The 49ers and the coaches there, we'll come to a conclusion of what we should do. I'm just so fired up, I'm excited about everything and just ready to work hard."