Anyone on the field can, usually only the defense does
Any player on the opposing teams defense is allowed to sack the quarterback.
You sack the quarterback or you are sacking the quarterback.
AFAIK, It's a safety, not a sack.
A sack is when the quarterback is tackled behind the line of scrimmage before he can throw a forward pass/lateral. Tackling the quarterback behind the lime of scrimmage on a running play is not considered a sack.
The forward progress of the quarterback, which is usually where a quarterback starts moving backwards.
a sack of a quarterback behind the line of scrimage, that is a sack
A sack is when the quarterback is tacked behind the line of scrimmage before he is able to pass the ball.
No, for the player to get credit for a sack he would have to tackle the quarterback behind the line of scrimmage. The quarterback would have to be declared down for it to be counted as a sack. If the quarterback is down then there couldn't be a fumble. So therefore there could be no fumble recovery.
When the defense tackles the quarterback behind the line of scrimmage for a loss.
MICHAEL STRAHAN 2001 Season with 22.5 Sacks
When a defensive player tackles a quarterback behind the line of scrimmage as he is trying to throw the football .... that is called a sack.
No, it is not considered a tackle. Technically when a quarterback goes down behind the line of scrimmage it is considered a sack. However, when a quarterback takes a knee, he is credited with a -1 yard rushing but no defender is credited with the tackle/sack.