Baseball section

Baseball rulings, with the timing made clear.

This section is for the calls that hinge on sequence: whether a runner was forced, whether a fielder had the right to the lane, whether a tag beat the touch, and when the ball was live or dead. Each page should show the order an umpire works through so the ruling is easy to follow from first event to final signal.

Rules library

Browse Baseball rules by topic

25 plain-English explainers, grouped by the kind of decision you need to settle.

Essentials and setup

Players, playing areas, equipment, positions, and the basic structure of the sport.

Baseball Courtesy Runner and Pinch Runner Rules

Compare pinch-runners with courtesy and temporary runners, including eligibility, lineup consequences, re-entry limits, and competition differences.

Baseball Mound Visits and Pitching Change Rules

Learn MLB mound-visit limits and pitching-change rules, including removal requirements, three-batter minimums, inning endings, and injury exceptions.

Hit by Pitch Rules Explained

Hit by pitch rules in baseball explained: when the batter gets first base, when it is only a ball or strike, dead-ball awards, and common HBP myths.

Infield Fly

Baseball infield fly explained step by step: when it applies, what ordinary effort means, and why runners are protected even if the ball drops.

MLB Pitch Clock Rules

MLB pitch clock rules explained: pitch timer limits, automatic balls and strikes, batter readiness, disengagements, pickoffs, and reset rules.

Scoring and match formats

How points, goals, results, tied contests, and competition formats are decided.

MLB Extra Innings Automatic Runner Rule

MLB extra innings automatic runner rule explained: runner on second, batting order placement, pinch-runners, postseason exception, and earned-run scoring.

Fouls, penalties, and conduct

Illegal contact, violations, cards, discipline, and how sanctions are applied.

Baseball Fair Territory and Foul Territory Rules

Learn how baseball determines fair or foul using lines, bases, poles, first contact, bounces and catches, with examples of commonly disputed balls.

Baseball Foul Ball and Foul Tip Rules Explained

Baseball foul ball and foul tip rules explained: when the ball is dead, when it counts as a strike, why foul tips stay live, and what changes with two strikes.

Baseball Ground Rule Doubles and Fan Interference

Understand ground-rule doubles and spectator interference, including dead-ball timing, two-base awards, legal catches, and umpire placement of runners.

Baseball Runner Interference Rules Explained

Learn when baseball runners interfere with fielders, throws or batted balls, including running-lane calls, protected fielders, exceptions, and penalties.

Baseball Umpire Interference Rules Explained

Learn when baseball declares umpire interference after a blocked catcher throw or batted-ball contact, and when play stays live instead.

Catcher Interference

Catcher interference in baseball explained: when the batter gets first base, when the offence can take the play, how runners advance, and common myths.

Obstruction vs Interference

Baseball obstruction and interference explained step by step: who committed the violation, when the ball stays live, and how umpires award bases.

Timing, restarts, and reviews

Clocks, substitutions, restarts, replay systems, reviews, and official procedure.

Baseball Appeal Plays and Missed Bases

Learn how baseball appeals handle missed bases and early tag-ups, including who may appeal, deadlines, live-ball procedure, and scoring effects.

Baseball Live Ball and Dead Ball Rules

Baseball live ball and dead ball rules explained: when play continues, when it stops, how runners are placed, and why the umpire's Time and Play calls matter.

Baseball Replay Review and Challenge Rules

See how MLB replay works, including manager challenges, crew-chief reviews, reviewable calls, evidence standards, and placement after an overturn.

Baseball Substitution and Re-Entry Rules

Understand baseball substitutions, batting-order positions, pinch-hitters, pinch-runners and pitcher changes, plus how amateur re-entry rules differ.

Play and decisions

The live-play rulings, sequences, and judgment calls that decide what happens next.

Balks

Baseball balks explained step by step: which pitcher movements trigger a balk, when the ball stays live, and how runner awards are handled.

Baseball Catch and No-Catch Rules Explained

Baseball catch and no-catch rules explained: what secure possession means, when a drop cancels a catch, how tag-ups work, and why voluntary release matters.

Baseball Collision and Slide Rules Explained

Understand baseball collision rules at home plate and on double plays, including legal slides, blocking, avoidable contact, penalties, and exceptions.

Baseball Designated Hitter and Lineup Rules

Learn how baseball's designated hitter fits the lineup, when the DH role is lost, how substitutions work, and when a starting pitcher may also bat.

Baseball Strike Zone and Check Swing Rules

Baseball strike zone and check swing rules explained: what makes a pitch a strike, how the zone is judged, and why checked swings are umpire judgment calls.

Batting Out of Order

See how baseball corrects batting out of order, when the defence must appeal, which batter is out, and which advances or substitutions remain valid.

Dropped Third Strike

Baseball's dropped third strike rule explained: when the batter can run, first base occupied, two-out exception, catcher tags and throws, and scoring oddities.

Tagging Up and Force Plays

Baseball tagging up and force plays explained: when runners must advance, when the force is removed, appeal plays, caught fly balls, and inning-ending timing.

Focus areas

Where baseball gets technical

Force plays and appeals: when the force is still on, when it disappears, and how missed-base or leaving-early appeals change an inning.
Interference and obstruction: who owns the running lane, when a fielder is protected, and how umpires award bases after illegal contact or blocking.
Balks, dead balls, and awards: what stops play immediately, what stays live, and how runners are placed after the violation.

Teach baseball

Use the printable baseball lessons

Move from reading the rule to making the call. Each free resource includes a teaching sequence, an eight-situation learner sheet, and a reasoned answer key.

Force play or tag play? — forces, force removal, appeals, and run scoring.
Obstruction or interference? — player priority, contact, intent, and award timing.
Catch, no catch, or infield fly? — control, voluntary release, ordinary effort, and live-ball consequences.

Browse all teaching materials →

How pages should work

Built for fast answers

Start with the ruling first.
Walk through the play event by event.
Separate live-ball action from dead-ball awards.
Show the one timing detail that changed the call.

Official references

Where these rulings come from

MLB Official Information - MLB's official rules, glossary, replay, and umpire reference hub.
MLB Rules Glossary - plain-language explanations of baseball rule terms and common rulings.
MLB Infield Fly - the official glossary entry for one of baseball's most misunderstood calls.
MLB Obstruction - the official explanation of obstruction and how base awards are handled.
MLB Pitch Timer - the official glossary entry for pitch clock limits, violations, and disengagement rules.
MLB Mound Visit - the official glossary entry for charged visits, limits, and visit exceptions.
MLB Official Baseball Rules: Rule 5.10 - official substitution, re-entry, pitching-change, and unannounced-substitute rules.
MLB Automatic Runner - the official glossary entry for the regular-season extra-innings runner.
MLB Designated Hitter Rule - the official glossary entry for DH lineup use, substitutions, and loss of the DH.
MLB Hit-by-pitch Glossary - the official glossary entry for HBP awards, scoring, and umpire discretion.
MLB Replay Review - the official glossary entry for manager challenges, crew-chief reviews, and reviewable calls.
Little League Rules, Regulations, and Policies - youth-baseball rules and operational guidance where local interpretations often differ from pro baseball.