Defensive Formation – 4-3 Defense Diagram

"This base defense consists of four defensive linemen, three linebackers, and four defensive backs (two safeties, two corners). Against two-receiver offensive sets, this formation is effective against the run and the pass. In the original 4–3, defensive tackles would line up opposite the offensive guards, and defensive ends on the outside shoulders of the offensive tackles. On passing downs, the Mike (middle linebacker) is often responsible to cover any running backs, the Sam (strong-side linebacker) covers the Tight End, and the Will (weak-side linebacker) either covers a back or blitzes in an attempt to sack the quarterback. Though first used as a base defense by the New York Giants in 1956, plenty of teams experimented with it during the 1950s, and thus there are multiple claimed inventors of this defense. There are several different variations of the 4–3 defense such as the 4-3 under defense, 4-3 over defense, 4-3 umbrella defense, 4-3 swim defense, and 4-3 slide defense." [List of formations in American football. Wikipedia]
This example diagram was redesigned from the Wikimedia Commons file: 4-3 green.svg.
[commons.wikimedia.org/ wiki/ File:4-3_ green.svg]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [creativecommons.org/ licenses/ by-sa/ 3.0/ deed.en]
The American football positions diagram example "Defensive Formation - 4-3 defense" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Football solution from the Sport area of ConceptDraw Solution Park.

"The goal line is the chalked or painted line dividing the end zone from the field of play in American football and Canadian football. It is the line that must be crossed in order to score a touchdown
If any part of the ball reaches any part of the imaginary vertical plane transected by this line while in-bounds and in possession of a player whose team is striving toward that end of the field, this is considered a touchdown and scores six points for the team whose player has advanced the ball to, or recovered the ball in, this position. This is in contrast with other sports like Association football and ice hockey, which require the puck or ball to pass completely over the goal line to count as a score.
If any member of the offensive team is downed while in possession of the ball behind his own team's goal line, this is called a safety and scores two points for the defensive team.
If, during the course of play, a loose ball travels past the goal line and is recovered within the end zone, then it is a touchdown if recovered by the kicking team, or a touchback if recovered and downed by the receiving team.
In the event of a kick recovered in one's own end zone, the entirety of the ball must pass the goal line in order for the ball to be considered in the field of play, and not a touchback." [Goal line (gridiron football). Wikipedia]
The American football positions diagram example "Goal line formation (Offense/ Defense)" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Football solution from the Sport area of ConceptDraw Solution Park.

"In association football, the formation describes how the players in a team are positioned on the pitch. Different formations can be used depending on whether a team wishes to play more attacking or defensive football. ...
The 4–3–3 was a development of the 4–2–4, and was played by the Brazilian national team in the 1962 World Cup. The extra player in midfield allows a stronger defence, and the midfield could be staggered for different effects. The three midfielders normally play closely together to protect the defence, and move laterally across the field as a coordinated unit. The three forwards split across the field to spread the attack, and may be expected to mark the opposition full-backs as opposed to doubling back to assist their own full-backs, as do the wide midfielders in a 4–4–2. When used from the start of a game, this formation is widely regarded as encouraging expansive play, and should not be confused with the practice of modifying a 4–4–2 by bringing on an extra forward to replace a midfield player when behind in the latter stages of a game. This formation is suited for a short passing game and useful for ball retention.
A staggered 4–3–3 involving a defensive midfielder (usually numbered four or six) and two attacking midfielders (numbered eight and ten) was commonplace in Italy, Argentina, and Uruguay during the 1960s and 1970s. The Italian variety of 4–3–3 was simply a modification of WM, by converting one of the two wing-halves to a libero (sweeper), whereas the Argentine and Uruguayan formations were derived from 2–3–5 and retained the notional attacking centre-half. The national team which made this famous was the Dutch team of the 1974 and 1978 World Cups, even though the team won neither." [Formation (association football). Wikipedia]
The diagram example "Association football (soccer) formation 4-3-3" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Football solution from the Sport area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ sport-soccer