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defense / man coverage
Man coverage underneath with one deep safety and a robber hunting routes across the middle.
Animated assignment view
Corners align with man leverage while the low safety initially holds enough depth to resemble a two-safety rotation.
Ball at the line
How it works
Five defenders match eligible receivers, the free safety protects the deep middle, and the robber reads the quarterback from low depth. The robber can close throwing lanes that appear open against ordinary Cover 1.
Challenge releases tightly while adding an inside help defender against slants, digs, and crossers.
Most defenders follow one receiver, one safety stays deep, and another safety waits in the middle to jump short throws.
The robber's depth must discourage glance and dig routes without exposing seam access before the post safety can overlap.
Call structure
The robber can align near two-high depth before rotating down at the snap, making the call resemble split-safety coverage.
{
"schema": "openplay-football",
"schemaVersion": "0.1",
"id": "cover-1-robber",
"slug": "cover-1-robber",
"name": "Cover 1 Robber",
"side": "defense",
"category": "man-coverage",
"personnel": {
"id": "nickel-personnel",
"name": "Nickel",
"grouping": "4 DL, 2 LB, 3 CB, 2 S",
"positionCounts": {
"DL": 4,
"LB": 2,
"CB": 3,
"S": 2
}
},
"formation": {
"id": "over-front",
"name": "Over Front",
"family": "four-down",
"strength": "right",
"description": "The front shades toward the offensive strength while the secondary presents one high safety."
},
"situationTags": [
"third-down",
"man-coverage",
"single-high"
],
"players": [
{
"id": "le",
"position": "DE",
"label": "E",
"initialCoordinate": {
"x": 20,
"y": 1
},
"alignment": "Left edge",
"side": "defense",
"ratingRole": "passRush"
},
{
"id": "dt",
"position": "DT",
"label": "T",
"initialCoordinate": {
"x": 24,
"y": 1
},
"alignment": "Three technique",
"side": "defense",
"ratingRole": "passRush"
},
{
"id": "nt",
"position": "DT",
"label": "N",
"initialCoordinate": {
"x": 28,
"y": 1
},
"alignment": "Shade",
"side": "defense",
"ratingRole": "runDefense"
},
{
"id": "re",
"position": "DE",
"label": "E",
"initialCoordinate": {
"x": 33,
"y": 1
},
"alignment": "Right edge",
"side": "defense",
"ratingRole": "passRush"
},
{
"id": "will",
"position": "LB",
"label": "W",
"initialCoordinate": {
"x": 22,
"y": 5
},
"alignment": "Weak hook",
"side": "defense",
"ratingRole": "manCoverage"
},
{
"id": "mike",
"position": "LB",
"label": "M",
"initialCoordinate": {
"x": 30,
"y": 5
},
"alignment": "Strong hook",
"side": "defense",
"ratingRole": "manCoverage"
},
{
"id": "lcb",
"position": "CB",
"label": "C",
"initialCoordinate": {
"x": 6,
"y": 5
},
"alignment": "Press left",
"side": "defense",
"ratingRole": "manCoverage"
},
{
"id": "nickel",
"position": "CB",
"label": "N",
"initialCoordinate": {
"x": 17,
"y": 4
},
"alignment": "Apex left",
"side": "defense",
"ratingRole": "manCoverage"
},
{
"id": "rcb",
"position": "CB",
"label": "C",
"initialCoordinate": {
"x": 48,
"y": 5
},
"alignment": "Press right",
"side": "defense",
"ratingRole": "manCoverage"
},
{
"id": "robber",
"position": "S",
"label": "R",
"initialCoordinate": {
"x": 26,
"y": 9
},
"alignment": "Low middle",
"side": "defense",
"ratingRole": "zoneCoverage"
},
{
"id": "free",
"position": "S",
"label": "F",
"initialCoordinate": {
"x": 27,
"y": 16
},
"alignment": "Deep middle",
"side": "defense",
"ratingRole": "zoneCoverage"
},
{
"id": "off-x",
"position": "WR",
"label": "X",
"initialCoordinate": {
"x": 5,
"y": -1
},
"alignment": "Wide left",
"side": "offense"
},
{
"id": "off-h",
"position": "WR",
"label": "H",
"initialCoordinate": {
"x": 17,
"y": -2
},
"alignment": "Left slot",
"side": "offense"
},
{
"id": "off-y",
"position": "TE",
"label": "Y",
"initialCoordinate": {
"x": 36,
"y": -2
},
"alignment": "Right slot",
"side": "offense"
},
{
"id": "off-z",
"position": "WR",
"label": "Z",
"initialCoordinate": {
"x": 49,
"y": -1
},
"alignment": "Wide right",
"side": "offense"
},
{
"id": "off-rb",
"position": "RB",
"label": "RB",
"initialCoordinate": {
"x": 31,
"y": -6
},
"alignment": "Backfield",
"side": "offense"
}
],
"preSnap": {
"description": "Corners align with man leverage while the low safety initially holds enough depth to resemble a two-safety rotation.",
"shifts": []
},
"assignments": [
{
"id": "lcb-man",
"playerId": "lcb",
"type": "man-coverage",
"targetPlayerId": "off-x",
"leverage": "inside"
},
{
"id": "nickel-man",
"playerId": "nickel",
"type": "man-coverage",
"targetPlayerId": "off-h",
"leverage": "inside"
},
{
"id": "rcb-man",
"playerId": "rcb",
"type": "man-coverage",
"targetPlayerId": "off-z",
"leverage": "inside"
},
{
"id": "mike-man",
"playerId": "mike",
"type": "man-coverage",
"targetPlayerId": "off-y",
"leverage": "trail"
},
{
"id": "will-man",
"playerId": "will",
"type": "man-coverage",
"targetPlayerId": "off-rb",
"leverage": "head-up"
},
{
"id": "robber-zone",
"playerId": "robber",
"type": "zone-coverage",
"zone": [
{
"x": 18,
"y": 5
},
{
"x": 35,
"y": 5
},
{
"x": 34,
"y": 13
},
{
"x": 19,
"y": 13
}
],
"responsibility": "Read the quarterback and cut in-breaking routes in the low middle."
},
{
"id": "free-middle",
"playerId": "free",
"type": "zone-coverage",
"zone": [
{
"x": 10,
"y": 12
},
{
"x": 44,
"y": 12
},
{
"x": 53,
"y": 35
},
{
"x": 0,
"y": 35
}
],
"responsibility": "Protect the deepest middle and overlap vertical routes."
},
{
"id": "left-rush",
"playerId": "le",
"type": "pass-rush",
"path": [
{
"type": "straight",
"to": {
"x": 23,
"y": -7
}
}
],
"technique": "Contain rush"
},
{
"id": "three-tech-rush",
"playerId": "dt",
"type": "pass-rush",
"path": [
{
"type": "straight",
"to": {
"x": 26,
"y": -6
}
}
],
"technique": "Penetrate B gap"
},
{
"id": "nose-rush",
"playerId": "nt",
"type": "pass-rush",
"path": [
{
"type": "straight",
"to": {
"x": 27,
"y": -6
}
}
],
"technique": "Collapse pocket"
},
{
"id": "right-rush",
"playerId": "re",
"type": "pass-rush",
"path": [
{
"type": "straight",
"to": {
"x": 31,
"y": -7
}
}
],
"technique": "Contain rush"
}
],
"timeline": [
{
"type": "pre-snap",
"atMs": 0
},
{
"type": "snap",
"atMs": 500
},
{
"type": "assignment-start",
"atMs": 550,
"playerId": "robber"
},
{
"type": "play-end",
"atMs": 4500
}
],
"narrative": {
"summary": "Man coverage underneath with one deep safety and a robber hunting routes across the middle.",
"fullExplanation": "Five defenders match eligible receivers, the free safety protects the deep middle, and the robber reads the quarterback from low depth. The robber can close throwing lanes that appear open against ordinary Cover 1.",
"strategicPurpose": "Challenge releases tightly while adding an inside help defender against slants, digs, and crossers.",
"idealSituations": [
"Third and medium",
"Against quick in-breaking concepts",
"When the pass rush can win with four"
],
"strengths": [
"Tight coverage on every receiver",
"Robber helps inside",
"Extra defender can fit the run"
],
"weaknesses": [
"Crossing traffic can create separation",
"Outside routes lack immediate help",
"Mobile quarterbacks can escape man defenders"
],
"keyRead": "The defense keys receiver releases while the robber reads the quarterback's shoulders and the free safety stays deeper than every route.",
"watchFor": [
"The robber driving an in-breaker",
"Corners maintaining inside leverage",
"The free safety controlling both seams"
],
"beginnerExplanation": "Most defenders follow one receiver, one safety stays deep, and another safety waits in the middle to jump short throws.",
"advancedNote": "The robber's depth must discourage glance and dig routes without exposing seam access before the post safety can overlap."
},
"simulation": {
"difficulty": "advanced",
"conceptTags": [
"man-coverage",
"cover-one",
"robber"
],
"baseSuccessRate": 0.56,
"yardRange": {
"min": -12,
"max": 45
},
"turnoverRisk": 0.055
},
"defensiveStructure": {
"front": "Over four-down front",
"personnel": "Nickel 4-2-5",
"coverage": "Cover 1 Robber",
"rushPlan": "Rush four with contain edges while the low safety replaces a hook defender as the robber.",
"runFits": [
"Ends set the edges",
"Tackles control interior gaps",
"Linebackers fit open A and B gaps",
"Robber inserts late as extra support"
],
"disguise": "The robber can align near two-high depth before rotating down at the snap, making the call resemble split-safety coverage.",
"strengths": [
"Inside route help",
"Tight man leverage",
"Extra run-support defender"
],
"weaknesses": [
"Natural rub routes",
"Back-shoulder throws",
"Quarterback scrambling"
],
"idealSituations": [
"Third and medium",
"Condensed formations",
"Quick-game tendency"
],
"vulnerableConcepts": [
"mesh",
"four-verticals",
"outside-zone"
]
}
}