What Is the Mercy Rule in Baseball?
Quick answer
A rule that ends a game early when one team leads by a set margin after a set number of innings, such as 10 runs after five. Common in youth, high school and college ball; MLB doesn’t use it.
In this article
The mercy rule ends a baseball game early when one team is ahead by a set number of runs after a set number of innings. It's also called the run rule or ten-run rule. It's common in youth, high school and college baseball, where lopsided games happen more often, but MLB doesn't use one.
Mercy rules by level
The exact numbers vary by league and state, so always check your league's rules. Common versions:
| Level | Common mercy rule |
|---|---|
| Little League | 10 runs after 4 innings (3½ if the home team leads) |
| High school | Set by each state; often 10 runs after 5 innings, sometimes 15 after 3 |
| College | Allowed by some conferences, often 10 runs after 7 innings |
| International (e.g. World Baseball Classic) | Used, with margins set by the event |
| MLB | None |
Why leagues use it
- Protect players. Pitchers in a blowout throw a lot of extra pitches, which matters with youth pitch counts.
- Save time. Fields, umpires and doubleheaders run on tight schedules.
- Sportsmanship. It avoids running up the score on a badly overmatched team.
How it works in practice
- The game ends as soon as the margin is reached after the required number of innings, often in the middle of an inning if the home team is ahead.
- The result is official, and stats count.
- Some youth leagues let teams keep playing for practice after the official end.
Mercy rule vs. forfeit
A mercy-rule game ends because of the score. A forfeit ends because a team can't or won't play by the rules, and it's recorded as a 9-0 win.
Related terms
More definitions: baseball terms explained.
Frequently asked questions
What is the mercy rule in baseball?
It is a rule that ends a game early when one team is ahead by a set margin after a set number of innings, such as 10 runs after five innings. It is also called the run rule or ten-run rule.
What is the Little League mercy rule?
In Little League, a game ends if a team leads by 10 or more runs after four innings, or after three and a half innings if the home team is ahead.
Does MLB have a mercy rule?
No. MLB games are always played to completion. International events such as the World Baseball Classic do use a mercy rule.
Does a mercy-rule game count as a full game?
Yes. The result and the stats count, just as they would in a game that went the full distance.
