"Well, how much advancement, I don't really know how to measure it," Harbaugh said. "But he's getting better there. He never played that before, really. He's been a center his whole career. He's been a starting center. So some of this stuff was different for him. The techniques [and] the angles were different, and that showed up in practice last week. That's why we decided to play Mark at guard. And Mark did OK. I think Mark will get better, too. But I think Andre is going to make a lot of progress real fast. He could be part of that equation real soon."