cnn s coy wire explains why this could prove to be an inflexion point for player safety in the nfl. hi, jim, this is showing that the culture of football in the nfl and the gladiator mentality and the perception that players are replaceable pieces of meat, well, that s changing. before demar hamlin s injury, no nfl game his been called off mid game and now two more in the pre-season alone. dolphins-jaguars game, davis taking a blow to the head midway through the fourth quarter. davis was down several minutes before being carted off to the hospital and dolphins say he was conscious and had movement in all extremities. he, jags coach, doug peterson and the two team s player association reps all agreed that that game needed to be stopped. without a shadow of a doubt i know that was the right call, so i m proud of the collective group for doing the right thing. he was a guy that, you know, his