In College Football, the most yards that the offense or defense can be penalized is 15 yards. In the NFL, that is unknown since a pass interference penalty on the defense is spotted at the spot of the foul. That means the penalty could be 20 yards, 30 yards, or even more. The most yards the offensive team can be penalized is 15 yards for a personal foul. *But since the NFL, etc. have the half-distance rule, the most you could lose is 50 yards (if you are on 'x' down and inches, the distance to the other endzone is 100 yards; half of this is 50 yards).
Same as in all levels of football: 5 yards for illegal substitution. The exception would be if 12 people actually participate in the play. That's illegal participation, which is 15 yards.
99 yards
100 yards
The penalty for an Illegal Forward Pass is 5 yards from the spot of the foul and loss of down.
Yes. It is illegal to impede the progress of any player, regardless of whether the player is in possession of the ball, by sticking your leg out and attempting to trip them. The penalty is 10 yards.
5 yards
In the NFL, the penalty is 15 yards. In college, the penalty is 10 yards.
12 yards.
Starting in 2010, the wedge on a kick return is illegal. An illegal wedge is 3 or more players who intentionally line up within 2 yards of each other on the return of a free kick. A block does not have to occur for it to be a foul and the penalty is 15 yards.
The maximum distance that can be given as a penalty in American football is half the distance to the opponent's goalline; for example, if you were on the 15-yard line and received 10 yards of penalty, the maximum you could gain is 7.5, or 8 yards rounded.
It is called the penalty arc. It is to ensure that defenders are 10 yards from the penalty spot when a penalty kick is taken.
The standard penalty for delay of game in American Football is 5 yards.