Breakdown: The Vikings' efforts to improve their defense under new coach Mike Zimmer will get a firm test early in the season; the team will have faced Tom Brady, Drew Brees and Aaron Rodgers by Oct. 2, with two of those three games coming on the road. The Vikings will have to handle that stretch of their schedule if they want to burnish their playoff chances with a soft stretch in the middle of the season -- four consecutive games against Detroit, Buffalo, Tampa Bay and Washington, with a bye week coming at the end.via - NFL Nation