For the 49ers their health has become a greater concern than their preseason performance. They just need to make sure they have enough healthy bodies to keep their key starters out of harm's way. More than 20 players missed their preseason opener vs. the Denver Broncos with injuries, and that number could rise Saturday when they face the Raiders.

Raiders rookie Ashton Jeanty proved he could deliver hits and absorb them at the NFL level, rushing for a bruising 33 yards and a touchdown on seven carries in Las Vegas' 22-19 preseason loss to the San Francisco 49ers on Saturday.