One reason for optimism in Baltimore is that the competitive juices seem to be flowing, particularly from Coach John Harbaugh. Just ask sideline reporter Brent Harris, who got a taste of it in preseason. The passionate us-against-the-world vibe has long been a staple of Ravens football, and the fire has been fueled by the tough schedule handed down by the league. (Sunday's opener is in Denver, a team that rarely loses at home, aside from their last game there, a playoff loss to the Indianapolis Colts, or perhaps the double-overtime loss to the Ravens in 2013.) The lack of depth at wide receiver and uncertainty over the defensive secondary may give fans pause, but worse deficits have been overcome.