Lions’ coordinator: We play violent defense, but can’t have injuries

Lions defensive coordinator Gunther Cunningham sat his players down recently and delivered a message: Violence is allowed. Injuries are not. “We’ve really explained the facts of life to them,” Cunningham said, via DetroitLions.com. “I told them about a philosophy that we play violent defense, aggressive, between-the-lines, honest, fair and we’re going to cover. But the…