What Is a Balk? The Balk Rule in Baseball, Explained

The idea behind it

Runners on base get a lead and watch the pitcher. Once the pitcher starts to deliver to the plate, they can run. The balk rule protects them: the pitcher may not start something and then not finish it, or pretend to do something, in a way that could fool a runner. When the umpire calls a balk, every runner gets the next base.

That’s why a balk needs runners on base. The same illegal move with the bases empty is called an illegal pitch, and the batter is simply awarded a ball.

The common balks

While the pitcher is touching the rubber, each of these is a balk:

• Starting the pitching motion and stopping, or flinching, without delivering.
• Not coming to a stop in the set position before pitching.
• Faking a throw to first without throwing.
• Not stepping toward the base before throwing to it.
• Throwing, or faking a throw, to an empty base, unless it’s to make a play on a runner.
• Quick-pitching: pitching before the batter is reasonably set in the box.
• Dropping the ball while on the rubber, unless it rolls across a foul line.
• Pitching while not facing the batter.
• Taking a hand off the ball after coming set, without pitching or throwing.

Once the pitcher steps back off the rubber, they’re a fielder like any other and can fake throws freely.

The penalty, and what happens to the pitch

	High school (NFHS)	MLB
When the ball is dead	At once: the umpire calls “Time” and “That’s a balk”	Delayed: play goes on
The pitch	Doesn’t count: no ball, no strike, no play	Waved off, unless the batter and every runner advance anyway
Runners	Each moves up one base	Each moves up one base

In MLB, if the pitch is delivered and the batter reaches first and every runner advances at least one base on the play (say, on a hit), the play stands and the balk is ignored. High school doesn’t wait: the play is dead the moment the balk happens. The batter never gets first base for a balk; only the runners move.

Little League: no balks in Majors and below

In Little League’s Major Division and younger, runners can’t lead off, so there’s nothing to deceive and no balks are called, even with runners on. An illegal move is an illegal pitch instead:

• The batter is awarded a ball. Runners don’t advance.
• If the batter and all runners reach safely on the play anyway, the illegal pitch is ignored.
• The pitcher doesn’t have to come to a complete stop in the set position.

Balks start in the Intermediate (50/70) Division and older, where runners may lead off.

A few things that are not balks

• Faking to third, then turning to throw to first. High school allows this “third-to-first” move; MLB has called it a balk since 2013. Little League’s older divisions follow their own rulebook, so check your league.
• A pitcher stepping off the rubber and then faking a throw.
• Third pickoff or step-off in a plate appearance. MLB has called that a balk since 2023, with the pitch clock. That rule is MLB only: high school and Little League have no limit on pickoff attempts.

What parents see

The umpire points at the pitcher and calls “That’s a balk,” then waves each runner to the next base. In high school that’s the end of the play.