Strike three does not always complete the out.

The ruleset used on this page

This explanation applies the Office of the Commissioner of Baseball, Official Baseball Rules, 2026 Edition, the current published edition for the 2026 season. It governs MLB and the professional development league system described in its foreword. The book does not give these provisions a separate calendar effective date. The controlling provision is Rule 5.05(a)(2), read with Rules 5.06(c)(7), 5.08(a), 5.09(a), 6.01(a)(1) and the Rule 9 scoring provisions.

“Dropped third strike” is the familiar name, but uncaught third strike is more accurate: the pitch may bounce, pass the catcher, be gloved and then lost before a legal catch is completed, or rebound in a way that prevents a legal catch. This page does not claim that NCAA, NFHS, Little League, softball or a local competition uses every MLB procedure; use that competition's current rulebook where MLB rules do not govern.

Strike three, no legal catch, then the base-out test

1. Was it strike three? The third strike can be called or result from a swing and miss.
2. Did the catcher legally catch it? Under Rule 5.09(a)(2), the ball must be secured in the catcher's glove before touching the ground. A ball lodged in clothing or equipment, or caught after rebounding from the umpire, is not legally caught.
3. May the batter become a runner? Rule 5.05(a)(2) says yes when first is unoccupied, or whenever there are two outs. If first is occupied with none or one out, Rule 5.09(a)(3) makes the batter out.

Use the base situation that existed for the pitch. A runner leaving first on a steal does not retroactively make first “unoccupied” for that third strike.

A bounce can never be rescued into a caught third strike

If the pitch touches the ground before reaching the catcher, it cannot be a legally caught third strike. Rule 5.05(a)(3) expressly says that a pitch which bounces through the strike zone is a ball unless the batter swings; after two strikes, a swing and miss at that bouncing pitch creates an uncaught third strike.

A clean-looking transfer is different. The 2026 definition of “Catch” says a fielder need not secure the ball in the throwing hand: complete control followed by an intentional opening of the glove to transfer the ball is a catch. But control lost during or immediately after a collision or fall is not. A third strike that passes the catcher, hits the umpire and is caught on the rebound also remains uncaught under Rule 5.06(c)(7) Comment.

The batter is out, but the pitch normally stays live

When first base is occupied and there are zero or one out, the uncaught pitch does not make the batter a runner. Rule 5.09(a)(3) retires the batter immediately, so the defence does not need to tag the batter or throw to first.

That automatic out does not by itself make the ball dead. Existing runners may advance at their own risk and the defence may make a play on them. A separate dead-ball provision—such as the equipment-lodged or interference rules discussed below—can change that result.

The batter becomes a batter-runner

If Rule 5.05(a)(2) applies, the batter is not automatically safe and is not awarded first base. The ball remains live, and any fielder may:

• tag the batter-runner before first base;
• touch first base while securely holding the ball before the batter-runner arrives; or
• make a play on another runner where an out is available.

Rule 5.09(a)(10) covers the tag or the putout at first. The catcher is usually the fielder nearest the ball, but the rule does not require the catcher personally to complete the out.

Every forced runner can become the third out

With two outs, the batter becomes a runner even when first is occupied. That can force the runner from first to second, the runner from second to third and, with the bases loaded, the runner from third to home. The defence may retire any forced runner by holding the ball on that runner's next base before the runner arrives. With the bases loaded, for example, the catcher can end the inning by touching home plate while holding the ball.

Rule 5.08(a) also controls whether a run counts. No run scores if the third out is made by the batter-runner before touching first, on a force play, or by a preceding runner who fails to touch a base. Crossing home before the throw reaches first therefore does not save the run when the batter-runner is the third out before first.

The batter cannot walk indefinitely toward the dugout

Rule 5.05(a)(2) Comment addresses a batter who does not realise that strike three was uncaught. If the batter is not in the process of running to first, the umpire declares the batter out once they leave the dirt circle surrounding home plate.

Before that point, players should follow the umpire's live-ball signals and complete the play. An umpire's strike-three signal records the strike; it does not by itself say that an eligible batter-runner has been retired.

Clear hindrance makes the ball dead

Under Rule 6.01(a)(1), an eligible batter-runner who clearly hinders the catcher trying to field the uncaught third strike is out; the ball is dead and other runners return to the bases occupied at the time of the pitch. If an uncaught pitch remains near home plate and is inadvertently deflected by the batter or umpire, the rule also makes the ball dead, returns the runners and makes the batter out when the pitch was strike three.

Contact alone is not automatically interference. The rule's Comment says that when the pitch first deflects off the catcher or umpire and then touches the batter-runner, there is no interference unless, in the umpire's judgment, the batter-runner clearly hindered the catcher's attempt to field it.

A ball stuck in equipment produces a one-base award

Rule 5.06(c)(7) creates a special dead-ball result when a pitched ball lodges in the catcher's mask or paraphernalia, or in or against the umpire's body, mask or paraphernalia, and remains out of play. On strike three, the batter is entitled to first base and every runner advances one base.

This is an award, not the ordinary live-ball race after an uncaught third strike. It is why “the catcher must retrieve it and throw” is not a complete statement of the rule.

Not every loose strike three creates a runner

Besides first being occupied before two are out, MLB Rule 5.09(a) identifies strike-three situations in which the batter is out rather than becoming a runner. A foul bunt on strike three is an out, and a batter who attempts to hit strike three and is touched by the pitch is out under Rule 5.09(a)(6). These are not ordinary uncaught-third-strike races to first.

The strikeout remains even if the batter reaches

Rule 9.15(a)(3) credits the pitcher with a strikeout and charges one to the batter when the batter becomes a runner because strike three was not caught. Reaching first does not turn the plate appearance into a hit. This is how a pitcher or team can record more than three strikeouts in one inning.

The scorer then records why the advance occurred. Under Rule 9.13, a pitch too high, wide or low for ordinary catching effort—or one that touches the ground or plate before reaching the catcher and then gets away—is a wild pitch. A legally delivered pitch that should have been held or controlled with ordinary effort is a passed ball. Rule 9.12(e) says reaching first on a wild pitch or passed ball is not scored as a fielding error.

There is a narrower scoring wrinkle: if the batter-runner is retired after the catcher recovers the pitch but another runner advances, Rule 9.12(f)(2) records the strikeout, putout and any assists, and credits the other advance as a fielder's choice rather than automatically charging a wild pitch or passed ball.

The later tag or base play may be reviewable

MLB's official Reviewable Play Types list permits review of force plays and tag plays, so the subsequent out or safe call at first—or a force or tag elsewhere—can fall within replay review. The same list makes infield catch/no-catch, foul tips, batter interference and the 45-foot running-lane violation non-reviewable. Replay therefore does not provide a general second look at every judgment involved in an uncaught-third-strike play.

The runner from first is stealing

Situation: one out, a runner starts on first, and the runner breaks for second. The batter swings through strike three, which bounces away. By the time the catcher retrieves it, the runner has reached second.

Ruling: the batter is out under Rule 5.09(a)(3) because first was occupied for the pitch and there were fewer than two outs. The ball remains live, so the runner's attempt to advance can continue; the batter does not acquire first merely because the runner left it.

Bases loaded, two outs, strike three in the dirt

Situation: the bases are loaded with two outs. The batter swings over a pitch in the dirt, and the catcher recovers it beside home plate while the runner from third approaches.

Ruling: the batter becomes a runner under Rule 5.05(a)(2), so every existing runner is forced. The catcher may touch home while holding the ball to retire the runner from third. That force is the third out and no run scores under Rule 5.08(a).

The runner crosses home before the out at first

Situation: two outs, first unoccupied and a runner on third. Strike three escapes the catcher. The runner crosses home, but a fielder's throw reaches first before the batter-runner.

Ruling: no run. Rule 5.08(a) bars a run during a play in which the third out is made by the batter-runner before touching first, regardless of which happened first in time.

The pitch sticks in the mask

Situation: with one out and first occupied, the batter swings at strike three and the ball lodges in the catcher's mask, remaining out of play.

Ruling: apply the special award in Rule 5.06(c)(7): the ball is dead, the batter is entitled to first and each runner advances one base. Do not apply the ordinary “first occupied before two outs” result in isolation.

How to rule the play in order

1. Confirm strike three. Separate a swing or called strike from an uncaught ordinary foul.
2. Check for a legal catch. Look for control before the ball touched the ground and an intentional release.
3. Check special dead-ball events. A lodged pitch or interference can replace the usual live-ball result.
4. Freeze the base-out state for the pitch. If first was occupied with fewer than two outs, the batter is out; otherwise the batter becomes a runner.
5. Keep the ball live unless a rule stops play. Track the batter-runner and every advancing runner.
6. Identify the third out. A batter-runner out before first or a force out prevents runs from scoring on that play.
7. Score the event separately. Record the strikeout, then apply the wild-pitch, passed-ball, putout, assist or fielder's-choice rule that fits what happened.

Five shortcuts that give the wrong answer

• “Strikeout means the batter is always out.” The strikeout statistic and the batter-runner's safe/out result can diverge.
• “The catcher has to make the out.” Any fielder can tag the batter-runner or complete the putout at first.
• “A runner stealing second opens first.” The base-out test is fixed for the pitch.
• “The ball is dead when the batter is automatically out.” It normally remains live, and other runners can advance at risk.
• “Every escape is a passed ball.” The official scorer applies the ordinary-effort tests in Rules 9.12 and 9.13; many bouncing or unreachable pitches are wild pitches.

Governing-body sources and effective version

• Office of the Commissioner of Baseball — Official Baseball Rules, 2026 Edition: Rules 5.05(a)(2)–(3), 5.06(c)(7), 5.08(a), 5.09(a)(2)–(4), (6) and (10), 6.01(a)(1), 9.12–9.15, and Definitions of Terms
• Major League Baseball — Official Rules hub linking the 2026 edition
• Major League Baseball — Reviewable Play Types: force plays, tag plays and listed non-reviewable calls

Checked on 26 August 2026 against MLB's 2026 Official Baseball Rules and the unversioned official Reviewable Play Types list then published by MLB. The 2026 rule-change summary does not identify an amendment to the uncaught-third-strike provisions, and the rulebook gives them no separate calendar effective date. Competition, amateur, youth and softball rules may supplement or differ from this MLB baseline.