Ravens wide receiver Mike Wallace was ruled out with a concussion after taking a brutal hit from Vikings safety Andrew Sendejo during the first quarter of Sunday's game.

Wallace didn't look happy about not being able to return. CBS cameras showed him pacing the sideline, visibly frustrated with team trainers. Right tackle Austin Howard stopped Wallace to talk to him, and the veteran wideout was eventually ushered to the locker room.

"That's Mike; it's not surprising. Mike's a tough guy. He was adamant about wanting to get back in the game," Head Coach John Harbaugh said.

"But he has some kind of a concussion to some degree, and we'll find out over the next several days how that shakes out. But that doesn't surprise me."

Wallace caught a slant pass from Joe Flacco when Sendejo lowered his helmet and clobbered Wallace in the head.

Wallace's helmet popped off and his head snapped back against the turf. He remained on his back on the turf until team trainers sprinted to his side. Wallace walked off the field under his own power after several minutes.

Wallace fumbled the ball as he crumpled to the turf, and it was recovered by the Vikings, but referees flagged Sendejo for unnecessary roughness, negating the turnover. The Ravens ended up getting a 48-yard field goal from Justin Tucker on the drive to take a 3-0 lead.

Wallace's injury left the Ravens with just three healthy wide receivers: Michael Campanaro, Chris Moore and Griff Whalen. Breshad Perriman (concussion), Jeremy Maclin (shoulder) and Chris Matthews (thigh) were already inactive.

Prior to Sunday's matchup, Campanaro and Moore had a combined 12 catches for 104 yards this season. Whalen was re-signed earlier this week. The group finished the game with nine receptions for 90 yards and one touchdown.