Multiple preseason injuries created serious questions about San Francisco’s offensive line stability and backfield depth heading into Week 1.

The San Francisco 49ers downed the Las Vegas Raiders 22-19 at Allegiant Stadium on Saturday. Here's what we learned from the win.

The 49ers just can't catch a break. Right guard Dominick Puni left the 49ers' preseason game against the Raiders in the first quarter with a knee injury.