As the Ravens drafted in April, they knew several rookies probably would need to contribute immediately. When the team opens training camp at the Under Armour Performance Center this week — and when it begins the defense of its Super Bowl championship against the Denver Broncos in the regular-season opener Sept. 5 — it likely will follow that plug-and-play mentality. The Ravens never have started four rookies to begin the season, according to the Elias Sports Bureau, but that could change this year. Safety Matt Elam, inside linebacker Arthur Brown, defensive tackle Brandon Williams and fullback Kyle Juszczyk are top candidates to start because of their talent, opportunity and the way they fit the Ravens' schemes. “That's indicative of the intelligence and philosophy and confidence the Ravens have in their scouting staff,” said ESPN analyst Louis Riddick, a former director of pro personnel for the Philadelphia Eagles and Washington Redskins. “They're always setting the bar because they find guys who are right for what they want to do. They know these kind of things, and that's why they're always out in front.” Read more: http://www.baltimoresun.com/sports/ravens/bs-sp-ravens-rookies-report-0721-20130721,0,6034940.story#ixzz2Zg9B6jya