Looks like the NFL has passed a new rule. Basically, saying that players on the field must stand for the national anthem, but that all players are not required to be on the field for the anthem.
Yup, it's right up there with
QBs that have accuracy issues
RBs that have vision issues
Olineman that have strength issues
DTs that have play recognition issues
Lbers take false steps
CBs that have trouble locating the ball
Safeties that take poor angles.