It was revealed by Jim Harbaugh that sophomore FB Ben Mason suffered a meniscus tear. Mason, who is expected to be the team’s starting FB, is expected to return in a month and a half.
Harbaugh: "Ben Mason had complained about his knee a little bit, but the trainers couldn’t find anything wrong with it. He wound up getting an MRI that showed he had a meniscal tear, and will have meniscus surgery and be out for a month and a half."