What is RSC and a doctor stoppage? How a fight gets stopped

The short answer: a third party stops the fight

RSC stands for Referee Stops Contest. It is the term used mainly in amateur and Olympic boxing when the referee halts a bout because a fighter is taking one-sided punishment or can no longer defend safely. A doctor stoppage is when the ringside physician ends the fight over a cut, swelling or injury. Both stop the fight to protect a fighter before a count is needed — the same idea as a professional TKO.

RSC (the amateur term)

In professional boxing a referee stoppage is recorded as a TKO, but amateur boxing has traditionally written it as RSC. Depending on the governing body and era, sub-categories have been used — for blows to the head, for injury, or when one boxer is outclassed (the exact codes change as the sanctioning bodies revise their rules). In short, RSC is the amateur equivalent of a TKO.

Doctor stoppage

A doctor stoppage typically follows a bad cut and heavy bleeding, an eye swelling shut, or a head or other injury. The referee calls the physician in — between rounds or during the action — to check whether the fighter can continue. If the doctor says no, it is, as a rule, a TKO loss for the fighter who was pulled out.

How it relates to TKO, technical decision and no contest

In pro boxing and MMA, both referee and doctor stoppages are tallied as a TKO. The exception is when the stoppage is caused by an accidental foul (for example an accidental clash of heads that opens a cut). Most commissions then rule it a technical decision — decided on the scorecards up to that point — if a set number of rounds (commonly four) have been completed, and a no contest or technical draw if they have not (the precise threshold varies by jurisdiction).

This term is part of the combat glossary & rules guide. For the KO/TKO line see What is a TKO?, and for the scorecards see UD, SD and MD decisions. How a fight ends also shapes how you read each fighter's record.