Baseball Scoring Explained: Runs, Innings, Outs and the Notation
How a run is scored, what ends an inning, why a home run can be worth four, and how to read the shorthand on a scorecard.
Baseball scoring has one unit: the run. A run is scored when a player touches first, second and third base and then home plate, in order, before the fielding team records three outs. Every run is worth one, so a team's score is simply how many runners made it all the way round. There are no multi-point plays, only plays that bring several runners home at once.
That simplicity at the top hides a lot of structure underneath, because baseball measures a game in outs rather than in time. This guide covers how runs are scored, what ends an inning, how a game ends, and how to read the notation that makes a baseball scorecard look like code.
The short answer. One run per runner who completes the circuit of the bases. Nine innings, each split into a top half and a bottom half. A half-inning ends after three outs. The team with more runs after nine innings wins, and if the score is tied the game goes to extra innings.
How does baseball scoring work?
How do you score a run in baseball?
A batter has to become a baserunner, advance around all three bases, and reach home plate before the half-inning ends. The run counts for the team, and is credited to the runner who scored it. Whoever batted them in gets a run batted in, and those are frequently different people.
A run does not count if the third out is made before the runner reaches home. That is worth knowing because it is the most common source of confusion when a scoreboard appears not to update on a hit.
How many points is a home run worth?
A home run scores the batter plus every runner already on base, so it is worth between one and four runs.
| Situation | Runs scored | Name |
|---|---|---|
| Bases empty | 1 | Solo home run |
| One runner on | 2 | Two-run home run |
| Two runners on | 3 | Three-run home run |
| Bases loaded | 4 | Grand slam |
Nothing else in baseball has a fixed points value. A double that clears the bases scores three runs the same way a three-run homer does. The value of a hit depends entirely on who is standing on base when it happens.
How does a batter get on base?
- A hit. Single, double, triple or home run, depending on how many bases the batter reaches.
- A walk. Four balls, and the batter is awarded first base. Recorded as BB, for base on balls.
- Hit by pitch. The batter is awarded first base.
- An error. A fielder misplays a ball the batter should have been out on. The batter is on base but is not credited with a hit.
- Fielder's choice. The defence chooses to put out a different runner instead.
- Dropped third strike. If the catcher fails to catch strike three, and first base is open or there are two outs, the batter can run.
Outs, innings and how a game ends
How many innings are in a baseball game?
Nine, in professional baseball. Each inning has a top half, in which the away team bats, and a bottom half, in which the home team bats. Many amateur, college and youth competitions play seven innings, and softball is usually seven.
What ends a half-inning?
Three outs. A batting team keeps sending batters up until the fielding side records three of them, so an inning has no maximum length. Outs come from a strikeout, a ball caught on the full, a runner forced or tagged out, a runner caught stealing, and a handful of situational rules such as the infield fly. Outs reset to zero at the start of each half-inning.
Why does the home team sometimes not bat in the ninth?
Because the game is already decided. The home team bats second, so if it is ahead after the top of the ninth there is nothing left to play for and the game ends there. On a scoreboard this appears as an X in the home team's ninth-inning box, which means they did not bat rather than that they scored nothing.
The same logic in reverse produces the walk-off. If the home team takes the lead in the bottom of the ninth or later, the game stops instantly at the moment the winning run crosses the plate.
What happens if a baseball game is tied?
It goes to extra innings, played the same way as a normal inning, until one team is ahead at the end of a completed inning. Major League Baseball starts each extra inning with a runner already on second base, a rule introduced in 2020 and made permanent for the regular season, though it is not used in the postseason. Many amateur competitions apply a run rule or mercy rule instead, ending a game early when the margin passes a set figure.
The count: balls and strikes
Every at-bat is a race between four balls and three strikes.
- Four balls is a walk, and the batter goes to first base.
- Three strikes is a strikeout, and the batter is out.
- The count is written balls first. So 3-2 is three balls and two strikes, which is a full count.
- A foul ball with two strikes is not a third strike. The count sticks and the at-bat continues indefinitely. The exception is a bunt fouled off with two strikes, which is a strikeout.
How do you score a baseball game on a scorecard?
Baseball has its own century-old shorthand, built on numbering the nine fielding positions.
| Number | Position | Number | Position |
|---|---|---|---|
| 1 | Pitcher | 6 | Shortstop |
| 2 | Catcher | 7 | Left field |
| 3 | First base | 8 | Centre field |
| 4 | Second base | 9 | Right field |
| 5 | Third base |
Everything else follows from those numbers. 6-4-3 is a double play from shortstop to second baseman to first baseman. F8 is a fly ball caught by the centre fielder. E-6 is an error charged to the shortstop. K is a strikeout swinging and a backwards K is a strikeout looking, meaning the batter did not swing at strike three. Other common marks are BB for a walk, HBP for hit by pitch, FC for fielder's choice, SAC for a sacrifice and DP for a double play.
One notation catches everyone out. Innings pitched are written as 7.2, meaning seven and two-thirds innings. The digit after the point counts outs, not tenths, so it only ever reads 0, 1 or 2.
What do the baseball box score abbreviations mean?
| Abbreviation | Means | How it is worked out |
|---|---|---|
| AB | At-bats | Plate appearances excluding walks, hit by pitch and sacrifices |
| R / H | Runs / hits | Runs scored by the player, hits recorded |
| RBI | Runs batted in | Runs that scored as a result of the batter's action |
| AVG | Batting average | Hits divided by at-bats |
| OBP | On-base percentage | How often a batter reaches base, walks included |
| SLG | Slugging percentage | Total bases divided by at-bats, so it weights extra-base hits |
| OPS | On-base plus slugging | OBP added to SLG. The usual one-number summary of a hitter |
| IP | Innings pitched | Written in thirds, so 6.1 is six and one-third |
| ERA | Earned run average | Earned runs per nine innings pitched |
| WHIP | Walks and hits per inning pitched | Walks plus hits, divided by innings pitched |
When is a run batted in credited?
An RBI is credited when a run scores because of what the batter did, including a bases-loaded walk or hit by pitch. It is not credited when the run scores on an error, a wild pitch, a passed ball, a balk or a stolen base, and not on a run that scores while the batter grounds into a double play. That is why a team's RBI total does not always match its run total.
What has changed in the baseball rules recently?
Major League Baseball has changed more in the last few seasons than in the previous forty.
- The pitch clock, from 2023. Fifteen seconds with the bases empty and twenty with runners on, the runners-on timer cut to eighteen for 2024. A late pitcher concedes an automatic ball, a late batter an automatic strike. It is the first countdown clock the sport has had.
- Defensive positioning limits, from 2023. Two infielders must stand on each side of second base, which ended the extreme shift.
- Bigger bases, from 2023. Eighteen inches square rather than fifteen, shortening the distance between them.
- The automatic runner in extra innings. Introduced in 2020 and now permanent for the regular season, though not used in the postseason.
- An automated ball-strike challenge system. Adopted for the 2026 Major League season after trials in the minor leagues. Ball and strike calls stay with the umpire, but a limited number of calls per team can be challenged and reviewed by ball tracking.
Scoring a baseball game for a live stream
If you are scoring baseball to drive a broadcast rather than to fill in a results sheet, the scoring input is doing two jobs: keeping the record, and updating what viewers see. LIGR's LiveScore app is built for that. An operator presses the real events, ball, strike, out, run, pitching change, and the scoreboard graphic follows, with every press timestamped so the same input also produces statistics and highlight clips.
Where an official feed exists LIGR takes it instead, and the graphics are identical. At college, club and academy level there usually is no feed, which is where the scoring app earns its place. The overlay is data-bound in Fuse, so the count, the outs, the bases and the pitch clock duration are settings rather than a redraw. More on LIGR for baseball and the full feature set.
Frequently asked questions
How does baseball scoring work?
A team scores one run for every player who touches first, second and third base and then home plate before three outs are recorded. Every run is worth one, so there are no multi-point plays, only plays that bring several runners home at once. A game is nine innings long and the team with more runs at the end wins.
How many points is a home run in baseball?
A home run scores one run for the batter plus one for every runner already on base, so it is worth between one and four runs. With the bases empty it is a solo home run worth one, and with the bases loaded it is a grand slam worth four. No single play in baseball is worth more than four runs.
How many innings are in a baseball game?
Nine in professional baseball, each split into a top half in which the away team bats and a bottom half in which the home team bats. Many college, amateur and youth competitions play seven innings instead. If the scores are level after the final inning, the game continues into extra innings.
What ends an inning in baseball?
Three outs end a half-inning, and six outs end a full inning. Outs come from strikeouts, balls caught on the full, runners forced or tagged out, runners caught stealing and a few situational rules such as the infield fly. Because an inning is measured in outs rather than minutes, it has no maximum length.
What does the X mean on a baseball scoreboard?
It means the home team did not bat in that inning, not that they scored zero. The home team bats second, so if it is already ahead after the top of the ninth there is nothing left to play for and the game ends. The X marks a half-inning that was never played.
What does 6-4-3 mean in baseball?
It is a double play recorded in fielding position numbers, which run one to nine: pitcher, catcher, first base, second base, third base, shortstop, left field, centre field, right field. So 6-4-3 is shortstop to second baseman to first baseman. The same numbering drives error notation, where E-6 is an error charged to the shortstop.
What is a run batted in?
An RBI is credited to a batter when a run scores as a result of what they did, including a bases-loaded walk or hit by pitch. It is not credited when a run scores on an error, a wild pitch, a passed ball, a balk or a stolen base, or when the batter grounds into a double play. That is why RBI totals and run totals do not always agree.
Putting baseball on screen
LIGR is a cloud-native broadcast graphics platform for live sport. Score a game in the app, or take a data feed, and the scoreboard, stat panels and highlights follow automatically.