What is a balk in baseball? When a pitcher starts toward home and freezes with a runner aboard, that interrupted delivery is a balk: an illegal pitching action that usually gives each runner one base. The baseball balk rule also covers improper pickoff moves, and MLB’s disengagement limit adds another way for a pitcher to surrender a base.
What the Rule Protects Against
Consider a runner on first taking a secondary lead as the pitcher begins the delivery. The runner edges farther from the bag, expecting the ball to go home. If the pitcher could stop and throw to first instead, that commitment would become a trap.
Major League Baseball’s Official Baseball Rules address that problem in Rule 6.02(a). Its restrictions give runners a basis for judging whether the pitcher is delivering to the batter or making a play on a base. An obvious violation does not require proof that the pitcher planned to trick anyone.
When the Pitcher Must Finish the Delivery
From the stands, the balk baseball fans often recognize looks like a broken movement: the pitcher begins the delivery, hesitates, then freezes instead of releasing the ball. Once a pitcher touching the rubber starts a motion naturally associated with pitching, that delivery must continue. Even an accidental loss of balance can produce the call.
Before that motion begins, a pitcher using the set position with runners aboard must come to a complete stop. Watch the hands settle. Slowing them down while they keep moving does not meet the requirement, but there is no prescribed one-second pause.
The stop belongs before the delivery. A freeze after the delivery starts is a different matter.
How a Legal Pickoff Move Works
Watch the pivot foot first. If the pitcher steps backward off the rubber with that foot before beginning a throwing motion, the pitcher has legally disengaged and becomes a fielder for the subsequent throw. Stepping off cannot rescue a delivery already underway.
A pitcher who stays on the rubber faces tighter restrictions. Before throwing to a base, the pitcher must step directly toward it. A fake throw to first or third is illegal while engaged with the rubber; a throw or feint toward an unoccupied base is generally illegal unless it serves a play.
Legal footwork settles only part of the question in MLB. The disengagement count still matters.
How MLB Limits Pickoff Attempts
Since 2023, MLB generally permits two pitcher disengagements per plate appearance. Pickoff attempts count, and so do step-offs without a throw. The count resets when a runner advances.
After using both allowances, a pitcher contemplating another pickoff risks handing the runner a free base. A third disengagement is permitted, but an unsuccessful attempt produces a balk unless a runner advances during the play. Pick the runner off successfully and there is no such penalty.
That makes the third attempt a gamble even when the feet do everything correctly. The violation comes from the count, not a faulty move.
What Happens After the Umpire Calls a Balk
The batter does not automatically receive first base, and a balk call does not necessarily wipe out a completed play. If the pitcher delivers and the batter reaches first through a hit, error, walk, or another means, with every other runner advancing at least one base, the play stands without reference to the balk.
Otherwise, the normal penalty awards each runner one base without liability to be put out. A runner on first gets second. A runner on third trots home.
What Changes With Nobody on Base
With the bases empty, a pitcher might fire a quick pitch before the batter is reasonably set. That pitch remains illegal, but the umpire cannot award a balk: there are no runners to advance.
Rule 6.02(b) addresses illegal pitches with nobody on base, generally imposing a ball unless the batter reaches first through the resulting play. The set-position stop discussed above, however, is not required with the bases empty. Continuous movement alone does not turn that delivery into an illegal pitch.
Key Takeaways
- Separate a delivery toward home from a move toward a runner’s base.
- Watch for a complete stop before a set-position delivery, not a pause during it.
- Treat a legal step-off and an abandoned delivery as different actions.
- In MLB, keep track of disengagements as well as footwork.
- Follow the completed play before deciding which runners receive an award.
Frequently Asked Questions
What is an example of a balk in baseball?
A pitcher who begins delivering toward home while touching the rubber, then stops without pitching, has committed a balk. With a runner on first, that interrupted delivery normally sends the runner to second.
What are the 13 ways a pitcher can balk?
Rule 6.02(a)’s 13 violations fall into four groups, starting with delivery errors: beginning a pitching motion without delivering, pitching from the set without stopping, improperly separating the hands after taking a legal pitching position, and making a pitching motion off the rubber. Pickoff errors include faking a throw to first or third while on the rubber, throwing without stepping directly toward the base, and throwing or feinting toward an unoccupied base without a play. Ball-and-batter violations cover making an illegal pitch, delivering without facing the batter, dropping the ball while touching the rubber, and standing on or astride the rubber without the ball or feinting a pitch off it without the ball. The remaining group covers unnecessarily delaying the game and pitching an intentional walk while the catcher is outside the catcher’s box.
Why would a pitcher balk?
A pitcher may balk because of lost balance, a moment’s hesitation, or an incorrect pickoff move. You can see a pitcher balk under pressure without any deliberate attempt to fool a runner.
Can a pitcher balk with nobody on base?
No, a balk requires at least one runner on base. An illegal pitch with the bases empty falls under different provisions, and the penalty depends on the specific violation.
What is a balk in baseball pitching?
A balk is a prohibited pitching action with runners aboard, not a type of pitch. It can happen before the ball leaves the pitcher’s hand or during an attempted play on a runner.
Does the pitcher have to intend to deceive a runner for the umpire to make the call?
No, an accidental action can still violate a specific balk provision. The rule’s commentary tells umpires to consider intent in doubtful cases, but an obvious violation does not require proof of deliberate deception.
Watch the Motion Before the Pitch
First identify what the pitcher was attempting when the call came. For a delivery, watch the transition from the required stop into the pitching motion. For a pickoff, focus on the pivot foot before following the throw. That order helps distinguish an illegal move from a legal move that exceeds MLB’s disengagement allowance.
At the 1961 All-Star Game at Candlestick Park, wind disrupted San Francisco pitcher Stu Miller’s motion and he was called for a balk. A deliberate trick was not necessary. The useful question is what the pitcher’s body did, not what the pitcher meant to do. Then follow the completed play and the umpire’s placement of the runners to understand the result.