a deceptive gesture by the pitcher used to deceive the runner into thinking that he is delivering the ball
an illegal act by a pitcher with a runner or runners at the bases, which entitles all the runners to advance one base
an illegal act by the pitcher with a runner or runners on base, entitling all runners to advance one base
Any deceptive movement that disconcerts an opponent before or during the service.
Penalty for an illegal movement by the pitcher. The rule is designed to prevent pitchers from deliberately deceiving the runners. If called, baserunners advance one base.
An illegal movement by a pitcher that results in runners moving up one base. The most typical balk occurs when a pitcher, with runners on base, begins his motion towards home plate to throw a pitch and then stops before delivering the ball.
An illegal, often deceptive move by the pitcher, penalised by a ball being called, or letting baserunners advance one base.
An illegal motion by the pitcher with one or more runners on base, entitling all runners to advance one base. A balk can be one of a number of movements related to the pitching motion but the intention is to catch the runners off balance.
An illegal act by the pitcher with at least one runner on base. All runners are entitled to advance one base.
If the pitcher stops his motion toward home plate once movement toward the plate has begun, and he turns to throw to another base, a balk is rewarded to the batter. This results in a ball being called and each of the base runners advancing one base.
An illegal pitch, or illegal move by a pitcher. See the Balk rule in section 2 of the FAQ.
An illegal movement by a pitcher. Balks are called for various reasons, typically if a pitcher, with runners on base, begins his motion towards home plate to throw a pitch and then stops before delivering the ball. A balk results in runners moving up one base.