Catcher's Interference Rule: The Call and the Option Play

The bat comes through, there is a dull click instead of a crack, and the catcher shakes his left hand. The pitch rolls a few feet in front of the plate, or dribbles to the second baseman, or ends up in the mitt. The plate umpire points at the catcher, then at first base. The batter, who may have just grounded into what looked like a double play, trots to first instead.

That is catcher's interference, and Rule 5.05(b)(3) of the Official Baseball Rules sets the penalty used across Major League Baseball and the minor leagues: when the catcher or any other fielder interferes with the batter, the batter is awarded first base, and the catcher is charged with an error. Runners advance only if they are forced by the batter taking first, or if they were stealing on the pitch. The umpire does not kill the play at once. If the batter and every runner advance at least one base anyway, the interference is ignored. If the play turned out better for the offense than the award, the manager can decline the penalty and keep the result.

The catcher's interference rule in one sentence, and the penalty in full

Put as plainly as possible: if the catcher's mitt or body gets in the way of the batter's swing, the batter goes to first.

That sentence covers almost every case anyone sees. The rulebook's version is wider. It says the catcher "or any fielder," which in theory covers a first baseman charging a bunt so early that he gets in the batter's way. In practice it is the catcher, because he is the only fielder within reach of the bat.

The penalty has three parts. The batter gets first base. The catcher is charged with an error. Runners move up only if forced, with the exception for a stealing runner covered below. Nobody else gets anything. A runner on third with first base empty does not score, even though the interference cost the hitter his swing.

What "interferes" means

The usual case is contact between the bat and the catcher's mitt during the swing. It can also be the catcher's hand, his arm or his mask, if he leans so far forward that the swing hits him. A catcher who reaches in and touches the bat before the pitch arrives interferes too, though that is rare and usually tied to the squeeze play, discussed further down.

Contact is not strictly required. The rule says interfere, and an umpire can call interference if the catcher's movement prevents the batter from swinging even without touching him. In practice umpires almost never call it without contact, because there is nothing to see.

How it actually happens: late swings and close setups

Catcher's interference is a collision between two people trying to do their jobs well. The hitter is trying to let the ball travel as deep as possible before swinging, especially on pitches he wants to drive the other way. The catcher is trying to receive the pitch as early and as quietly as possible, often reaching toward it to present a borderline pitch as a strike. Their spaces overlap behind the plate.

A batter whose swing goes deep into the hitting zone, with his hands staying inside the ball and the barrel trailing, carries the bat closer to the catcher than one who meets the ball out front. Hitters who stand deep in the batter's box, near the catcher, add to it. When that hitter takes a late swing at an outside pitch, the barrel's path may cross the space where the catcher's mitt is moving forward to catch the ball. Click.

Why a closer setup leaves less margin

The catcher controls where he sets up, within limits. The rules ask him to station himself directly behind the plate, and within that space he can set up close to the hitter or deep, and closer is better for framing pitches and for throwing out runners. A catcher who sets up closer, or reaches forward to receive, reduces the distance between his mitt and the batter's bat.

The other side is that the catcher cannot see the bat once the pitch is on its way. He is watching the ball. He has no idea whether the batter is about to swing or how deep the swing will go. A catcher who reaches for a low pitch to steal a strike has no way to pull back when the hitter starts swinging at the same pitch.

That is the mechanics. The trends behind the rise in calls are a separate story, told at the end of this guide.

A delayed dead ball: play continues until it is over

Most interference rules in baseball kill the ball at once. Catcher's interference does not. The plate umpire signals the interference, usually by pointing at the catcher or calling it aloud, and lets the play run.

The reason is that the batter may still hit the ball. A catcher's mitt clips the end of the bat, the bat keeps going, the ball is hit on a line to the gap, and the batter ends up on second with a run scoring. Killing the play at contact would take that away from the offense. So the umpire waits.

When the play ends, two outcomes are possible.

The interference is ignored. If the batter reached first base, whether on a hit, an error, a walk, a hit by pitch or any other way, and every other runner advanced at least one base, the play stands and the interference is wiped out. Nobody has to decide anything. The offense got at least what the award would have given it.

The umpire enforces it. If the batter did not reach first, or any runner failed to advance one base, the umpire calls time and applies the penalty: batter to first, runners forced or stealing move up, everyone else back to where he was. The play that happened is erased unless the manager chooses to keep it.

1. 1Contact during the swingThe bat strikes the catcher's mitt or body, and the plate umpire signals interference without stopping play.
2. 2Play runs to its endThe ball is live, so a batted ball is fielded and runners advance or are put out as usual.
3. 3Did everyone advance?If the batter reached first and every runner gained at least one base, the interference is ignored.
4. 4Manager's choiceOtherwise the offense's manager may keep the play as it happened or take the interference award.
5. 5Penalty appliedIf he takes the award, the batter goes to first and only forced or stealing runners move up.

The procedure under Rules 5.05(b)(3) and 6.01(c) of the Official Baseball Rules; the manager's option exists only in the enforcement branch.

A missed base does not cancel it

The rule includes a protection for runners who lose track of things on a chaotic play. If the batter-runner misses first base or a runner misses the next base, he is treated as having reached it for purposes of deciding whether the interference is ignored. A runner who rounds second and forgets to touch it does not cost his team the award.

The manager's option and when it beats the award

The most interesting part of the rule is the choice it gives the offense.

When the play does not meet the "everyone advanced" test, the umpire's default is to enforce the interference. But the manager of the batting team can tell the plate umpire, immediately after the play, that he declines the penalty and accepts the play. The rule requires the election to be made immediately at the end of the play.

It makes sense when the play produced a run that the award would not. The classic example:

• Runner on third, one out.
• The batter's bat clips the catcher's mitt, but he still lifts a fly ball to medium-deep center.
• The center fielder catches it; the runner tags and scores.

Enforcing the interference would put the batter on first and send the runner back to third, since he was not forced. Taking the play scores the run at the cost of an out. Most managers take the run.

Other cases where the play is better

Not every case is a sacrifice fly. A batter hits into a fielder's choice that moves a runner from second to third and puts the batter on first, with the lead runner thrown out at home. Or the batter grounds out to the right side, which advances two runners a base each. In the first case, the manager compares two base-out states and has to decide which is better. In the second, he gives up an out for two advanced runners or keeps the out and has fewer runners in scoring position.

In practice, the umpire usually turns to the dugout and waits, or the manager comes out to discuss it. The managers' decisions are almost always quick. They have been taught these cases since the minor leagues.

One more detail: a manager who chooses the play rather than the award keeps everything from the play. The batter's out stands, the run scores, the RBI on a sacrifice fly is credited.

Three plays, three different answers

Take a runner on second with nobody out, and a bat that clips the mitt on every one of these.

The batter grounds to shortstop, and the runner holds at second while the batter is thrown out at first. The batter did not reach base, so the interference is not ignored. The manager compares the play (one out, runner on second) with the award (nobody out, runners on first and second). The award is better by a wide margin. He takes it, and the umpire puts the batter on first.

The batter grounds to the right side, and the runner moves to third while the batter is thrown out at first. Again the batter did not reach, so the choice is live. Now the play gives him a runner on third with one out, and the award gives him runners on first and second with nobody out. Most managers still take the award, because an out is expensive and two runners with nobody out is the stronger position. Some, late in a close game with a reliable contact hitter coming up, might keep the runner on third. Either answer can be defended.

The batter singles to left, and the runner stops at third. The batter reached first and the only runner advanced a base. The interference disappears without anyone saying a word. The batter keeps his hit, and nobody has a choice to make.

The third case surprises people who assume the award is always available. It is not. The rule gives the manager an option only when the play left the offense short of what the award would have provided at a minimum: the batter on first and every runner up one. If the play delivered that much, there is nothing to decline and nothing to enforce.

The double play that never happened

The case managers like most is the double-play ball. With a runner on first and fewer than two outs, a batter whose bat ticks the mitt and then rolls a grounder to second watches the defense turn two. Under the award, both outs vanish. The batter goes to first, the runner goes to second, and the inning that seemed over has two runners on and the same number of outs as before the pitch. No manager declines that. It is the clearest illustration of why the umpire waits for the play to end: the penalty is designed so that the defense can never come out ahead because its catcher got in the way.

Where the runners go when the interference is enforced

The advancement rule is the same as on a hit batsman, with one difference: a runner stealing on the pitch is awarded the base he was trying to reach. On a hit by pitch the ball is dead at contact, so a stealing runner gets nothing unless forced. On catcher's interference, a runner who was going gets the base.

Runners before the pitch	After the interference is enforced	Run scores?
Runner on second only	Batter on first, runner stays on second	No
Runner on second, stealing third	Batter on first, runner awarded third	No
Runners on first and third	Batter on first, runner from first to second, runner on third stays	No
Runners on first and third, double steal	Batter on first, runner to second, runner from third awarded home	Yes
Bases loaded	Batter on first, every runner moves up one base	Yes

That table works out the three scenarios most people get wrong. A runner on second only stays at second, because first base was open and he was not forced. With runners at the corners, the runner from first moves up, but the runner on third stays, because second base was empty before the runner from first moved into it. With the bases loaded, everybody moves, and a run scores.

Batter1bases

Runner on first1bases

Runner on second, first base empty0bases

Runner on third, first base empty0bases

Runner stealing on the pitch1bases

Runner on third, bases loaded1bases

Applies the award in Rule 5.05(b)(3) of the Official Baseball Rules; a runner stealing on the pitch is awarded the base he was going for, and runners not forced or stealing hold.

Show the numbers

Bases gained by each runner when catcher's interference is enforced

Item	Value
Batter	1bases
Runner on first	1bases
Runner on second, first base empty	0bases
Runner on third, first base empty	0bases
Runner stealing on the pitch	1bases
Runner on third, bases loaded	1bases

The stealing runner, worked through

A runner on first breaks for second on a 2-1 pitch. The batter swings and his bat hits the catcher's mitt; the pitch squirts away and the catcher cannot throw. Interference. The batter goes to first and the runner, already forced, takes second. If the runner was on second alone and stealing third, he gets third, because he was stealing, not because he was forced. A runner on second who was not stealing, with first base empty, stays put. The difference between the last two cases is whether the runner broke with the pitch.

The squeeze play and the steal of home: interference plus a balk

Rule 6.01(g) of the Official Baseball Rules handles a special case, and the penalty is heavier.

With a runner on third trying to score on a squeeze play or a steal of home, if the catcher or any other fielder steps on or in front of home plate without the ball, or touches the batter or his bat, the pitcher is charged with a balk and the batter is awarded first base for interference. The ball is dead.

Because a balk advances every runner one base, the runner from third scores. Any other runner moves up a base as well. The batter takes first. In one call, the offense gets a run, a base for every runner and a free trip to first.

The rule exists because a catcher who jumps out in front of the plate to catch a pitch on a squeeze could otherwise take the bat out of the batter's hands and tag the runner coming in. Charging a balk on top of interference makes sure the catcher cannot profit from it under any circumstances.

Why the balk is charged to the pitcher

The pitcher did nothing wrong. He threw a pitch. He is charged with a balk because the rule needs a mechanism to advance all runners one base, and the balk is the rule that does it. The mechanics of the balk itself, and what a pitcher has to do to commit one in the ordinary way, are in the site's explainer on the balk rule.

This version of the call is rare, because both the squeeze and the steal of home are rare. But it has decided games, and a catcher who catches a pitch over the plate on a squeeze attempt can expect it.

How catcher's interference is scored

The scoring treatment is consistent: the batter gets the base but no credit for it, and the catcher wears an error.

Statistic	Effect of catcher's interference
Batter's at-bat	Not charged
Batter's plate appearance	Charged
Batter's on-base percentage	Not counted on either side of the formula
Catcher's fielding	Charged with an error
Pitcher's line	No hit, no walk, a baserunner by error
Earned runs	Runs that depend on it can be unearned

On-base percentage is the odd one. The standard formula counts hits, walks and hit batsmen as times on base, and at-bats, walks, hit batsmen and sacrifice flies as opportunities. Catcher's interference is in neither column, so the batter's on-base percentage is the same as if he had never come up. The leading career totals in this category have been compiled by hitters who did not get on-base credit for them.

Perfect games and no-hitters

A batter who reaches on catcher's interference ends a perfect game, because a perfect game allows no baserunners at all. He does not end a no-hitter, because he did not get a hit. A pitcher can, in other words, lose a perfect game to his own catcher. The distinctions between the two achievements are set out in our guide to the perfect game versus the no-hitter.

Earned and unearned runs

Because the interference is an error, the official scorer treats it like one when reconstructing the inning. If a runner who reached on catcher's interference later scores, or if the interference extended an inning that should have ended, the runs that follow can be ruled unearned. The procedure the scorer uses for that reconstruction is in our guide to earned runs versus unearned runs.

What catcher's interference is not

Several plays look like catcher's interference and are ruled differently. The distinctions turn on who interfered with whom, and when.

The backswing or follow-through. If a batter swings and misses, carries the bat all the way around and, in the umpire's judgment, unintentionally hits the catcher or the ball in back of him on the backswing, it is a strike, and the ball is dead. No interference is called against anyone, and no runner may advance. The rule is in the comment to Rule 6.03(a)(3). This is the opposite of catcher's interference: the batter's bat hit the catcher, but after the swing at the pitch, not during it.

The batter interfering with the catcher. If a batter steps out of the box, or leans across the plate, or otherwise hinders the catcher's attempt to throw or field the ball, he is guilty of interference. Usually he is out, and runners return. If the runner the catcher was trying to throw out is retired anyway, the play stands and the interference is ignored. This is the mirror image of catcher's interference, and the two are frequently confused in the moment.

Obstruction. Obstruction is the act of a fielder who, without the ball and not in the act of fielding it, impedes a runner. Catcher's interference is a fielder getting in the way of a batter; obstruction is a fielder getting in the way of a runner. Our guide to obstruction versus interference in baseball works through the overlap.

Play	Who is at fault	Result
Bat hits catcher's mitt during the swing	Catcher	Batter to first unless the play is better
Bat hits catcher on the backswing after a miss	Nobody	Strike, ball dead, runners hold
Batter blocks catcher's throw to a base	Batter	Batter out, runners return, unless the runner is retired anyway
Catcher without the ball blocks a runner's path to the plate	Catcher	Obstruction, ruled under a different rule
Catcher in front of the plate on a squeeze attempt	Catcher	Balk plus interference, run scores

The difference between hitting the mitt and hitting the catcher

The timing is everything. During the swing at the pitch, contact with the catcher is his fault. After the swing has passed the plate and the bat is on its way around, contact with the catcher is nobody's fault and kills the play. The umpire has to see which it was, and on a fast swing it can be a matter of a few hundredths of a second.

Can catcher's interference be reviewed: what replay can and cannot settle

The list of plays a manager can challenge is set by Major League Baseball's replay review regulations, which the league and the union revise between seasons. Public summaries of that list have long centered on boundary calls, force and tag plays, fair or foul in the outfield, whether a pitch hit the batter, missed bases and timing plays, while excluding judgment calls such as balls and strikes, check swings and the infield fly. Whether a given season's regulations let a manager challenge catcher's interference is a question for the current document, and this page does not state a year in which it changed. Where a review of the play does happen, the question for the replay officials in New York is a factual one.

What they look for is simple: did the bat touch the catcher's mitt or body during the swing? High-speed cameras behind the plate and from the side often show it clearly. The sound is less useful on replay than live, because ballpark microphones pick up many noises at once, but the picture is often decisive. A bat that changes direction at the moment it crosses the catcher's mitt, or a mitt that jumps, is evidence of contact.

That makes it a better fit for video than most interference calls. Umpires often do not see or hear the contact live, so the play is missed rather than misjudged, and a missed fact is what a camera is best at correcting. The judgment parts of the play, such as whether the swing had already passed the plate, are harder.

• 31Jacoby Ellsbury, career
• 29Pete Rose, career
• 12Jacoby Ellsbury, 2016 season
• 2017Year Ellsbury passed Rose

Career and season figures as they stood through the 2025 season; Ellsbury reached base on interference for the 30th time on September 11, 2017, passing Pete Rose, and totals in this category can move as the call grows more common.

What replay cannot do

Replay can establish whether contact occurred. It cannot decide what follows from it in every case. If the play continued after the interference, the umpires still have to place the runners, and the manager still has to make his election if the play is not automatically ignored. A replay that confirms the interference sends the decision back to the field with the facts settled. The general framework for how challenges are filed and decided is in our guide to MLB replay review rules.

Why the call became common in the 2020s

Through most of the 2010s the call was a rarity, made a few dozen times a season across the majors by most counts. In the 2020s it rose sharply, to league-wide totals well above anything recorded before. The explanations offered by analysts and the people inside the game share a theme: catchers moved closer to the hitter.

The main driver most often cited is pitch framing. As clubs learned to measure how many strikes a catcher could steal, they began to value receiving above almost anything else a catcher does, and catchers adjusted their stances to get the low strike. The one-knee setup, usually with the right knee on the ground and the left leg out to the side, put the catcher lower and often closer to the plate. It also tempted the catcher to reach forward to receive low pitches. The site's piece on catcher framing explains how that skill is valued.

There is no single number that measures how much closer catchers set up, and claims to precision here should be treated with care. But the direction is not seriously disputed.

The safety question

A bat moving at full swing speed that clips a catcher's mitt is a violent event. Catchers have been hurt that way, mostly in the hand and wrist. The concern raised in the 2020s was that the setups that make framing possible also make injuries more likely, and that a rule which penalizes the defense only with a single base does not discourage the risk enough. Major League Baseball has not changed the catcher's box or the penalty. The automated ball-strike challenge system adopted for 2026 may change the incentive indirectly, since a framed strike can now be challenged, but whether catchers set up deeper as a result is a question the next few seasons will answer.

The hitters who collect them: Ellsbury, Rose and the swing path

Jacoby Ellsbury holds the career record for reaching on catcher's interference, with 31. He also set the single-season record with 12 in 2016, his third season with the New York Yankees. He passed Pete Rose, whose 29 had stood as the career mark since Rose retired in 1986, on September 11, 2017, his 34th birthday.

Ellsbury and Rose had little in common as hitters except a swing that let the ball travel deep. Ellsbury, a left-handed hitter, was widely described as letting pitches get deep and swinging late with his hands inside the ball, a path that carried the bat back toward the catcher. Rose, a switch-hitter, had a short, compact stroke from both sides.

Skill or side effect

The fair question is whether drawing catcher's interference is something a hitter can do on purpose. The evidence suggests it is mostly a side effect. Ellsbury was not trying to hit the catcher's glove, and it would be a poor plan: a bat that hits the mitt usually hits the ball weakly or not at all, and the hitter is relying on the umpire noticing. What is true is that some swing paths and some stances produce the call far more often than others, and a hitter with one of them will collect a handful a season regardless of intent.

Those totals are records as they stood through the 2025 season. With the call far more common than in Rose's day, the single-season mark is the more exposed of the two.

Games it has decided

Catcher's interference is a rule most fans can go years without seeing, and then it ends a game.

The walk-off version is the purest. Bases loaded, bottom of the ninth or extra innings, tie game. The batter swings, the bat clips the mitt, and the winning run is forced home. The umpire still has to let the play finish; if the batter put the ball in play and the runner from third scored anyway, the play stands as a hit or a fielder's choice. If the batter missed, or hit into an out at home, the interference is enforced and the forced runner scores. In either case the game is over once the runner touches home and the batter reaches first, under the rule for game-ending awards. Our guide to the walk-off in baseball covers the conditions under which a game-ending run counts.

At the major league level it is rare enough that most fans never see one, but the rule makes it possible every time the bases are full late in a tied game, and the winning team scores without putting a ball in play cleanly. A confirmed interference with the bases loaded in the ninth is about as final as baseball gets.

Why such a rare call can end a game

The answer is that the rule is a free base, and a free base with the bases loaded is a run. The same logic applies to a hit by pitch, as our guide to the hit by pitch rule explains, and to a bases-loaded walk. All three end games without a ball being hit hard. Catcher's interference stands out among them only because the defense's own catcher caused it, often in a way nobody in the ballpark saw clearly.

The full rules of the game, from the infield fly to the dropped third strike, are collected at the site's baseball rules hub.