Michael Crabtree says he temporarily lost his vision in the Super Bowl after a big hit from Baltimore's Jimmy Smith.
"I'm not one to whine about nothing, but he hit me all in the face and I couldn't really see after he hit me," Crabtree. "Then (my vision) just came back. It's not concussion-like. When you get hit, it's going to feel like you can't see. It's going to feel intense. But it snapped back. It happens all the time in football." It's obviously not a long-term concern for the 49ers' ascendant No. 1 receiver, but another reminder of the costs of playing football.