The "D-Line" refers to the defensive line in American football, a group of players positioned at the line of scrimmage. This unit's primary responsibility is to stop the opposing team's running plays and to pressure the quarterback during passing plays. The D-Line typically consists of defensive tackles and defensive ends, who work together to disrupt the offense's strategy. Players on the D-Line must possess strength, speed, and agility to effectively engage with offensive linemen and tackle ball carriers. Their performance is crucial for a team's overall defensive success, as they set the tone for the defense and can create opportunities for other players, such as linebackers and defensive backs, to make plays.