The San Francisco 49ers lost 34-0 to the Denver Broncos on Saturday in their second successive disappointing preseason game.

“We got to get better,” Jim Harbaugh said. “This is going to be an important week for us -- a big week. We need improvement. And we need to make decisions on who we’re playing with. We’re not going to keep experimenting. We got to tighten this down fast.”

The 49ers managed five first downs during Colin Kaepernick's two possessions, but did not score any points.