The Vikings were able to go through the first couple of days of training camp without the injury bug biting them. But that little bugger has reared its ugly head during the past two practices, and it has had a craving for the hamstrings of Vikings defensive backs in particular.

Safety Robert Blanton, who had been working with the first-team defense, sat out today's practice after injuring a hamstring during Monday night's practice. Then, this afternoon, cornerback Josh Robinson hurt a hamstring and left practice. He came back but did not resume practicing.

Coach Mike Zimmer hinted that Blanton's injury is the more concerning of the two.

"[Robinson's] got a tight hammy," he said. "I don't think it will be very long. It just got tight. It was more preventative. I told [athletic trainer Eric Sugarman] to [hold him out today.]"

Rookie tight end A.C. Leonard also left practice. Zimmer said he was dealing with a headache.

As for safety Andrew Sendejo, who is on the PUP list because of lower back and hamstring injuries, Zimmer expects him to be activated and start practicing with the team early next week.

There was some good injury news. Wide receiver Cordarrelle Patterson had full participation and seemed to get through the practice without issue. Cornerback Captain Munnerlyn also suited up, but was limited to just a little bit of individual work. He said after practice that he expects his participation to ramp up tomorrow and that he hopes to be a full-go by next week.

"You don't want to get yourself reinjured, but it feels great to be back on the field," he said.

In non-injury news, Zimmer indicated that the Chad Greenway experiment at middle linebacker is all but over. The Vikings are keeping him at outside linebacker for now so that they can evaluate others at the position. I guess Greenway could always be a fall-back option at the Mike, but you have to figure if the coaches liked what they had seen from him in the middle, they would have kept him there. Jasper Brinkley got most of the first-team reps between Greenway and top pick Anthony Barr, who was getting his first extensive look with the ones since he was drafted.

I guess I should mention that a certain other first-rounder got some first-team reps, too. Bridgewater got at least five reps with the ones before veteran Matt Cassel was inserted back with the first team. So #HowDidTeddyLook? Zimmer said Bridgewater was a little shaky.

"Ahhhh, he didn't look quite as accurate as he had throughout the whole camp," Zimmer said.