The Ghost Runner Rule in MLB, Explained

The ghost runner rule places an automatic runner on second base to start every half-inning once an MLB game reaches extra innings. That runner, who begins on second with nobody out, is the player who made the last out of the previous inning (or a pinch runner for him), and he gives each team an immediate scoring chance to help end long games faster.

Officially, MLB calls it the “automatic runner” or “extra-innings runner,” but fans borrowed the old sandlot term “ghost runner” and it stuck. Introduced during the unusual 2020 season and later made permanent, it is one of the most debated rule changes in modern baseball. Here is how it works, why the league added it, and where it does and does not apply.

How the rule works, step by step

The mechanics are simple once a game is tied after nine innings:

1. Extra innings begin. The score is tied after the regulation nine innings.
2. A runner appears on second. To start the top of the 10th (and every half-inning after), the batting team places a runner on second base.
3. Who the runner is. It is the player who made the final out of the previous inning. A team may substitute a pinch runner for him.
4. No outs, runner in scoring position. Play begins with that runner on second and nobody out, so a single can often drive him home.

Both teams get the same setup in their half of the inning, so it stays fair, each side starts with a runner in scoring position.

Why MLB added it

The rule was born out of necessity in the pandemic-shortened 2020 season. With a compressed schedule and heightened concern for player health, the league wanted to avoid marathon extra-inning games that drained pitching staffs and stretched rosters thin. Putting a runner on second dramatically increases the chance a team scores, which means games tend to resolve in a few extra innings rather than dragging into the 15th, 16th or beyond.

The league liked the results, faster endings, less wear on pitchers, and kept the rule in place, eventually making it a permanent part of the regular-season rulebook in 2023.

Where it applies, and where it doesn’t

This is the detail that trips up casual fans. The automatic runner is a regular-season rule. It is not used in the postseason, where extra innings are still played the old-fashioned way, no free runner, play until someone wins. The playoffs keep the traditional format because the sport is willing to accept epic, high-stakes marathon games when a championship is on the line.

Situation	Automatic runner used?
Regular-season extra innings	Yes, runner on second to start each half-inning
Postseason extra innings	No, traditional extra innings
The 9th inning or earlier	No, only in extra innings
Run charged to pitcher’s ERA	No, the automatic runner’s run is unearned

The scoring wrinkle: earned vs unearned runs

One subtle but important point: if the ghost runner scores, that run is unearned for the pitcher, it does not count against his ERA, because he did not allow the runner to reach base. Any other runners the pitcher genuinely gives up are scored normally. This protects pitchers from being unfairly punished for a runner the rule handed to the other team, an important distinction if you care about a pitcher’s ERA and rate stats.

How it changes strategy

The automatic runner does more than shorten games, it reshapes how managers think in extra innings. With a runner on second and nobody out, the “small ball” tactics that had faded from the modern game come roaring back. A team batting in the bottom half often plays for a single run: a sacrifice bunt to push the runner to third, a ground ball to the right side, or a contact-hitting approach to bring him home. A team batting first (on the road) may play more aggressively to build a cushion, knowing the home side will get the same free runner in reply.

Pitchers and defenses adjust too. Intentional walks become more common to set up double plays or force outs, infields play in to cut down the run at the plate, and a manager may burn a pinch runner to put speed on second for the inning. None of these decisions existed in traditional extra innings, so the rule has quietly created a whole new layer of late-game managing.

The debate: pace vs purity

Few rules split baseball fans like this one. Supporters point to the practical wins: shorter games, healthier pitching staffs, and fewer position players forced to pitch in the 15th inning. Critics argue it is artificial, a runner who did nothing to earn second base can decide a big-league game, which they feel cheapens the result.

It fits into a broader wave of pace-of-play changes MLB has embraced, and like those changes it trades a bit of tradition for speed and player welfare. Whether you love it or hate it, it has clearly done its job of shortening extra innings, the very thing that produces dramatic finishes like a walk-off win.

The bottom line

The ghost runner rule hands each team a free runner on second to start every extra half-inning, turning drawn-out stalemates into quick, high-pressure scoring chances. Introduced in 2020 and permanent in the regular season since 2023, it does not apply in the playoffs, and the runner it provides scores as an unearned run. It remains one of baseball’s most argued-over modern tweaks, a small rule with an outsized effect on how tie games end.