Here are five storylines to follow as the Vikings open training camp this week at TCO Performance Center: There were flashes of brilliance from McCarthy in the spring; he impressed on the field with his arm talent, and off the field with his magnetic personality at the podium. Will he be able to keep the momentum going in the summer?

McCarthy has impressed, Brian Flores' defense looks sharp and there are roster battles aplenty as the Vikings prepare to put pads on Monday.

Bleacher Report analyst Matt Holder has suggested a major roster move for Minnesota before training camp. He has named veteran cornerback Rasul Douglas as a possible target for the Vikings. "Staying within the NFC North, the Vikings could use some help in their secondary after deciding not to bring Stephon Gilmore back," Holder wrote.