15 yards is the penalty for spearing.
Pass, rush, yards, interception, fumble, penalty, tackle, helmet, touchdown
It is illegal to attempt to tackle a ballcarrier by grabbing any part of the helmet. Prior to 2008, an unintentional or "incidental" grab was a 5 yard penalty, and an intentional grab with twisting or pulling was a personal foul 15 yard penalty. As of 2008, all helmet grabs are penalized 15 yards. This penalty is called a facemask.
The longest penalty in an NFL game is undefined. A defensive pass interference penalty is assessed from the line of scrimmage to the spot of the foul. If the spot of the foul is 30 yards beyond the line of scrimmage, the penalty is 30 yards. If the spot of the foul is 18 yards past the line of scrimmage, the penalty is 18 yards. If the spot of the foul is 9 yards past the line of scrimmage, the penalty is 9 yards. A defensive pass interference penalty is the only penalty that can be longer than 15 yards.
In the NFL, the penalty is 15 yards. In college, the penalty is 10 yards.
In college football, the penalty is 15 yards. In the NFL, the penalty is 10 yards.
The penalty area is 18 yards deep and 44 yards wide.
All players, except the penalty taker must be at least 10 yards away from the penalty spot when the penalty is taken. As the Penalty Area extends 18 yards from the goal line, and the Penalty Spot is 12 yards from the goal line, the distance from the Penalty Spot to the edge of the Penalty Area can be as little as 6 Yards. The Arc - not half circle - marks the area outside the Penalty Area, that is within 10 yards of the Penalty Spot, and therefore outside which players must be when the penalty is taken