Receiver Marcus Robinson, running back Ciatrick Fason and tackle Bryant McKinnie all left practice early Wednesday. Robinson "tweaked" a neck injury, though he went back onto the field but did not practice. Fason suffered a concussion during a goal-line drill, and McKinnie had a hand injury. McKinnie's right wrist and hand were heavily taped before practice, and both Fason and McKinnie walked off the field accompanied by trainers.
Free-agent linebacker Marcus Lawrence also missed practice with an unknown injury. Viking Update spotted him winching in pain after a hitting a blocking bag in special teams practice Tuesday afternoon.
None of the injuries appeared to be serious.
"We tell the guys to come out here and do what we do and trust that we'll have their overall best interest at heart, in terms of taking care of them," defensive coordinator Mike Tomlin said.
Safety Darren Sharper had a hamstring strain on Tuesday, but he was back on the field Wednesday, participating in some of the drills.
Left guard Artis Hicks, who was acquired on a draft-day trade with Childress' former team Philadelphia, has played on the left side for all of his four professional seasons, but he's making the shift to the right side, which is a more difficult transition than it might seem.
The plays are the similar, just flip-flopped, and his first step is usually in the opposite direction with his opposite foot.
"I tell people it's like being right-handed and trying to write with your left hand," he said. "It just doesn't feel right. The more reps I get, the more comfortable I feel."
On Wednesday, Hicks manhandled rookie defensive end Ray Edwards during a pass-rushing drills.
During a seven-on-seven drill, the Vikings defense made several good plays, including interceptions by linebacker Kyle McKenzie and cornerback Dustin Fox.
Cornerbacks Ronyell Whitaker and Dovonte Edwards both made diving breakups.
"I think things are starting to click, and we're coming together as a defense," Whitaker said. "There's a lot of competition out there. We're just trying to find out who meshes with who. We're raising the level of competition, and the guys want to compete."
Defensive coordinator Mike Tomlin said it's nice to see interceptions, but he also knows the defense has to make more traditional three-and-out stops, too.
"You take it when you can get it," Tomlin said.
"I've done it in the past," McMahon said. "I was just working on it because you never know."