‘“I feel where I’m most concerned is, even though there is not significant data out there to this point, my biggest concern is the health and safety of the players, first and foremost,” McDermott said Monday morning at the AFC head coaches’ breakfast, which is part of the NFL’s annual meeting. “It’s force, added force, No. 1, and then the posture of the players being asked to execute that type of play. That’s where my concern comes in.”’