Catch rules, explained.

How the call is made

1. Confirm the pass was still live and had not already hit the ground or gone out of bounds.
2. Decide whether the player secured control of the ball before it touched the ground.
3. Check whether the player came down inbounds. In the NFL this usually means two feet or another body part other than the hands; other codes may use a different standard.
4. Judge whether the player completed the process by making an act common to the game, such as taking another step, tucking the ball, turning upfield, extending the ball, or having enough time to do one of those things.
5. If the player loses control before that process is complete, the pass is incomplete unless the relevant rulebook says another result applies.

Details fans miss most

• Control is first: a ball pinned loosely, bobbled, or trapped against the ground may not be a catch.
• Feet are not the whole rule: getting feet down matters, but the player still has to complete the catch process.
• The ground can matter: if a player is still completing the catch and the ground helps knock the ball loose, officials may rule the pass incomplete.
• Movement is not always loss of control: the ball can shift slightly if the player still clearly controls it.
• Interceptions use the same basic idea: a defender must complete possession inbounds just as a receiver would.

Inbounds and out of bounds

Sideline catches are usually about two issues: where the player landed and whether control existed before landing. In the NFL, a receiver normally needs both feet down inbounds, or one qualifying body part such as a knee, shin, hip, shoulder, or back. Hands alone do not count as the inbounds body part.

A dragged toe can count if it touches inbounds before any part of the player touches out of bounds. If the foot lands in a normal heel-to-toe or toe-to-heel step and part of that same foot is out of bounds, officials may treat the foot as out of bounds. College and high school rules commonly use a one-foot standard, so the same sideline play can be ruled differently by code.

When the ground knocks it loose

The hardest catch rulings often happen when a player jumps, dives, or is hit while trying to secure the ball. Officials ask whether the player had already completed the catch before the ball came loose. If the catch was complete, later loss of the ball can be a fumble. If the catch was not complete, the result is usually an incomplete pass.

The important distinction is timing. A receiver who controls the ball, gets inbounds, turns upfield, and then has the ball knocked out has likely completed the catch. A receiver who is still falling as part of the catch and loses the ball when landing may not have completed it.

Touchdowns and possession

A catch in the end zone is a touchdown only if the player completes possession while the ball is in or over the goal line plane and the player is inbounds. Once the catch and touchdown are complete, the play is over. The player does not need to run out of the end zone or survive a later celebration, collision, or fall after the score is already established.

If the ball is still being bobbled, or if the player loses it before completing the catch, officials can rule incomplete even if the ball briefly crossed the goal line.

"He had two feet down"

Two feet down is often necessary in NFL-style rules, but it is not always enough. The player still needs control and either an act common to the game or enough time to perform one. That is why a receiver can tap both feet inbounds and still be ruled incomplete if the ball comes loose immediately as part of the same catching action.

The reverse is also true: a receiver does not have to take several steps if they clearly controlled the ball, satisfied the inbounds requirement, and held it long enough to show the catch was complete.

Special catch situations

• Simultaneous catch: when eligible opponents gain control at the same time and both keep it, many codes award the ball to the passing team. If one player controls it first, it is not treated as simultaneous just because an opponent later joins in.
• Carried out of bounds: some rules treat a player as having completed the pass if an opponent holds or carries them out before they can touch down inbounds.
• Previously out of bounds: a player who went out of bounds may need to reestablish inbounds before legally touching the pass. The exact consequence depends on the code.
• Backward passes and fumbles: catch wording usually concerns forward passes. Loose balls, laterals, and recoveries have related but separate possession rules.

How officials review it

Replay normally focuses on visible evidence: ball movement, hands under or around the ball, feet or body parts touching inbounds, the sideline, and whether the player had time or action after control. The on-field call can matter because replay systems usually require clear evidence to overturn it.

Officials do not need the ball to be perfectly still. They need to decide whether the player maintained control despite any movement. A small shift can be legal; a clear bobble, double catch, or loss against the ground can change the ruling.

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• VAR checks
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Source material

• NFL Video Rulebook: Completing a Catch
• NFL Rulebook: Rule 8, Section 1
• NCAA Football Rules of the Game
• NFHS Football Rules Changes