When A Coach Challenges.....

[*rfaulk34*]

(10-20-2017, 12:07 AM)MrRager Wrote: You would hope they know, but some weird rules exist in the NFL. Is illegal formation something you can challenge? What about if you feel a player went out of bounds and was the first to touch the ball, but is wasn't called? I know you can challenge 12 men on the field, can you for 12 men in the huddle? 

These are even some of the more common rules I am sure there are a thousand more that I am not even aware of. 

It could also be an entirely different reason, that was just a guess.

They can't throw a flag to have a missed penalty reviewed and they can't throw a flag to have a called penalty reviewed. If a whistle is blown, ending a play, it can't be challenged. If a whistle is blown early on a turnover, the only thing they review is if the ball is clearly recovered by the defense. The ball can't be advanced (bengals v steelers playoff game on the Gio hit/fumble).

The most common things they review when a flag is thrown:
Catch/no catch
Interception/no interception
Fumble/no fumble
In bounds/out of bounds

All touchdowns are automatically reviewed.