Incidental facemask

[Theisey]

Because the accepted practice is to give the option that benefits the team the most. Losing a down and taking a yardage loss by declining the other teams foul is not one of those options.

If any choice is non-obvious, you must explain it as clearly as possible. However for an obvious choice such as this play, there is no need to unless the captain objects. If he really wants the non-obvious choice then by all means, let him.