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Cricket Concussion Substitute Rules: replacement versus ordinary substitute

By Sourav Das Updated October 9, 2026
Original editorial illustration for Cricket Concussion Substitute Rules: replacement versus ordinary substitute
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On this page8
  1. 01What is the short answer on concussion substitutes?
  2. 02What can an ordinary substitute do?
  3. 03What makes a concussion replacement different?
  4. 04Why does the distinction matter?
  5. 05Which source controls the rule?
  6. 06How should a scorer record it?
  7. 07What does the comparison table show?
  8. 08What should readers check next?

TL;DR: An ordinary substitute fielder covers an absent player but is normally limited to fielding, while an approved concussion replacement can become a nominated player under the relevant ICC playing conditions. They are different legal statuses.

This guide explains the Law in plain language, then points readers to the competition document that controls a live decision.

What is the short answer on concussion substitutes?

A concussion replacement is not just another name for a substitute fielder. The MCC definitions distinguish a temporary fielder from a replacement who joins the nominated side, while ICC conditions govern the approval process.

What can an ordinary substitute do?

An ordinary substitute takes the place of a fielder and is limited by the Laws and playing conditions. The substitute does not automatically gain the absent player’s batting or bowling role.

What makes a concussion replacement different?

The relevant ICC competition rules can allow an approved replacement to participate as a nominated player. The medical assessment, like-for-like conditions and match-referee approval must be checked in the format document.

Why does the distinction matter?

It affects batting, bowling, fielding and scorecard eligibility. Calling every replacement a substitute can produce the wrong result.

Which source controls the rule?

The MCC player definitions provide the baseline; ICC playing conditions control international approval.

How should a scorer record it?

Record the player status used by the competition and keep the medical and referee decision separate from the ordinary fielding substitution.

What does the comparison table show?

TopicCurrent answerSource or ruleEditorial caution
Ordinary substituteTakes the place of a fielderMCC Appendix A.8.1Activities are normally limited to fielding
Replacement playerBecomes a nominated playerMCC Appendix A.8.2Not the same as a temporary substitute
Concussion replacementCompetition-specific approvalICC playing conditionsMedical assessment and match-referee process apply

The table keeps the definition, decision point and source together. That is safer than relying on a short broadcast phrase or a social-media graphic.

What should readers check next?

Open the named MCC, ICC or board document before applying the explanation to a match. Format-specific playing conditions can add detail to the general Law.

Frequently asked questions

Can an ordinary substitute bat?

Not automatically. Ordinary substitutes are normally limited to fielding.

Is a concussion replacement the same as a substitute?

No. The competition may allow a replacement to become a nominated player.

Who approves a concussion replacement?

The applicable ICC or competition process, including the match referee where required.

Does the MCC Law alone set every concussion detail?

No. The current playing conditions add the sport-specific approval rules.

When should this page be reviewed?

After an ICC or board playing-condition update.

What should readers check first?

The competition’s current playing conditions and the match referee process.

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Frequently asked questions

Can an ordinary substitute bat?+

Not automatically. Ordinary substitutes are normally limited to fielding.

Is a concussion replacement the same as a substitute?+

No. The competition may allow a replacement to become a nominated player.

Who approves a concussion replacement?+

The applicable ICC or competition process, including the match referee where required.

Does the MCC Law alone set every concussion detail?+

No. The current playing conditions add the sport-specific approval rules.

When should this page be reviewed?+

After an ICC or board playing-condition update.

What should readers check first?+

The competition’s current playing conditions and the match referee process.

Sources

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