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.

Bitter rivals clash as the San Francisco 49ers and the Las Vegas Raiders go head-to-head in Week 2 of the NFL preseason today.

If you don’t have cable, you’ll need a live TV streaming service to stream the 49ers vs. Raiders game for free. One option we love is DIRECTV, which comes with five days free and starts at $49.99/month, with plenty of subscription options and genre packs that include NFL Network.