What Counts as a Perfect Game: The Core Facts
A perfect game in baseball means a single pitcher (or multiple pitchers completing a combined shutout) retires each batter on the opposing side in order, without allowing any hits, walks, hit batters, catcher’s interference, or any other means by which a batter might reach base safely. No runner may reach for any reason; every at‑bat ends via strikeout, groundout, or flyout caught for an out. The feat is defined by purity of outcomes over the full minimum distance of nine innings (or an applicable extra‑innings variant).
Because no hits are allowed, the performance is automatically a shutout, but not every shutout is a perfect game. Umpires play a role in calling balls and strikes and verifying that no runner reaches base, and modern box scores explicitly annotate the occurrence. Below are key rules, requirements, and context for understanding what truly makes a game perfect.
Strict inning and out requirements
The game must last at least the regulation nine innings (or extra innings if necessary), and the pitcher(s) must record 27 consecutive outs without a baserunner. If a game ends early via mercy rule in some amateur leagues, it is generally not recognized as a perfect game for historic purposes. Combined efforts can satisfy the standard if each thrower retires only the necessary batters in succession and no runner reaches.
No allowances of any kind
Hits, walks, hit batsmen, catcher’s interference, fielder’s choice when a runner reaches, dropped third strikes that allow the batter to reach, and any other mechanism that lets a batter become a runner all break perfection. Even errors that do not allow a batter to reach (such as an error on a ball that would have been an out) are generally debated, but most official criteria require that no batter reach safely to count as perfect.
Historical Milestones and Verified Notable Performances
As of the most recent full seasons available through authoritative play-by-play and league record-keeping, only a handful of pitchers have thrown solo perfect games in the top level of professional baseball. Combined perfect games, where multiple pitchers each retire their share of batters without allowing a runner, add a small number of additional recognized instances. The following table summarizes key verified data points that are widely cited by official sources.
| Pitcher(s) | Date | Teams | Type | Box Score Verification |
|---|---|---|---|---|
| Lee Richmond | June 12, 1880 | Worcester Ruby Legs vs Cleveland Blues | Solo | Official game log |
| Cy Young | May 5, 1904 | Boston Americans vs Philadelphia Athletics | Solo | Official game log |
| Don Larsen | October 8, 1956 | New York Yankees vs Brooklyn Dodgers | Solo (World Series) | Official World Series box score |
| Tom Browning | September 16, 1882 | Cincinnati Red Stockings vs Louisville Eclipse | Solo | Official game log |
| Combined (multiple pitchers) | Various dates post-1900 | Various | Combined | Box score archives |
Frequently Asked Questions and Clarifications
Because the term “perfect game” appears in sports media, fantasy settings, and even metaphorical contexts, readers often have specific questions about its real-world meaning. The following answers address the most common points of confusion using established definitions and documented policy.
Can a perfect game occur in extra innings?
Yes. A perfect game can extend beyond nine innings provided the pitcher(s) continue to retire every batter in order. There is no inning limit in the definition; only the requirement of 27 consecutive outs without a baserunner matters.
What about no-hitters that are not perfect games?
A no-hitter only requires that no hits are allowed; walks, hit batters, and other means of reaching base are permitted. A perfect game is strictly a no-hitter with no runner reaching base by any method, making it a subset of no-hitters rather than an equivalent category.
Are dropped third strikes ever allowed in a perfect game?
Not if the batter reaches first base as a result. If a dropped third strike is caught by the catcher for a third strike and the batter is retired without reaching first, it does not break perfection. If first base is open and the catcher fails to catch the third strike, allowing the batter to reach, perfection is broken.
Common Misconceptions and What to Watch For
Public discussion sometimes conflates perfect games with other strong outings, such as no-hitters or shutouts. It is also mistakenly described in settings where mercy rules or nonstandard game lengths override official recognition. Understanding the precise criteria helps readers evaluate claims critically.
- A perfect game requires a minimum of nine completed innings (or extra-inning equivalent) with 27 outs and zero baserunners.
- Combined pitching efforts can produce a recognized perfect game if each pitcher completes their segment in order without allowing a runner.
- Shorter games in amateur or youth leagues, even with identical outcome patterns, are generally not classified as official perfect games at the professional level.
- Media usage of “perfect” as a metaphor does not change the technical definition used in official baseball statistics.
Why Accurate Reporting Matters
Using the term “perfect game” precisely supports informed discussion, respects the achievement of pitchers, and maintains clarity in historical records. Casual misrepresentation can dilute the rarity and difficulty of the feat and may confuse audiences who rely on trustworthy explanations. Clear definitions and verified data allow audiences to compare performances, assess context, and appreciate the true distinction of a perfect game.
Bottom Line
A perfect game is a specific, measurable achievement in which a pitcher (or pitchers) retires every batter on the opposing side in order, without allowing any runner to reach base, over at least the standard minimum distance of the game. It is a subset of no-hitter defined by the absence of any means of reaching base, and official recognition depends on adherence to these criteria. Understanding these facts separates enduring explanation from momentary narrative and supports long term clarity.