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

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

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.