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.

Mac Jones won't be taking any quarterback reps for the 49ers in practice this week or in their preseason finale against the Chargers on Saturday. 49ers head coach Kyle Shanahan told reporters at a Tuesday press conference that Jones sprained his knee in last weekend's game against the Raiders.