A statistic in football that records a team's total number of yards lost due to quarterback sacks in a single game.
Sack yards are recorded as negative yardage that is applied to the total passing yards of a team in a single game. Although sacks occur during a play in which a quarterback is attempting a pass, yards lost due to a sack do not subtract from the quarterback's individual passing yards. Sack yards are also tallied when a quarterback loses a fumble behind the line of scrimmage. In the event that a quarterback is tackled at the line of scrimmage, zero sack yards are recorded.
Sack yards also come into play when recording net yards per passing attempt (NY/A). The formula to calculate this statistic is (pass yards - sack yards) / (passing attempts + sacks).