The depth of the Rams will be sorely tested in the coming weeks as the team tries to dig out of the hole they’re in with their 0-and-3 start to the season.  Scott Linehan’s club has already lost several key players for the year, including offensive linemen Orlando Pace, Mark Setterstrom and Todd Steussie.  Third-year guard Richie Incognito hasn’t played because of a sprained ankle and this week the Rams will be minus all-pro running back Steven Jackson who is nursing a partial groin tear.  The Rams will seek their first win of the year in Dallas where they take on a Cowboys’ team that is unbeaten at 3-and-0.