Average MLB game time before and after the pitch clock
Average length of a nine-inning game. Gold bars are the pitch clock era, which began in 2023. The bars start at two hours so the difference is visible.
Game length by level
| Level | Regulation innings | Note |
|---|---|---|
| Major League Baseball | 9 | Extra innings start with a runner on second |
| College (NCAA) | 9 | Some conferences use run-rule endings |
| High school | 7 | Run rules end lopsided games early |
| Little League (Majors) | 6 | Pitch-count limits shape how long starters go |
The longest and shortest MLB games
Baseball is the one major American sport without a game clock, which is why “how long is a baseball game” has never had a single answer. A tidy pitchers’ duel can finish in two and a half hours; a wet night in April with three rain delays can run past midnight. What changed in 2023 is the baseline. The pitch clock took roughly half an hour out of the average game, and it changed how fast a live bet can move. This page covers innings, extra innings and weather, the average game time season by season, and the points at which a bet on a game becomes official.
Nine innings: how a baseball game is measured
An MLB game is scheduled for nine innings. Each inning has two halves. In the top half the visiting team bats until the defense records three outs, and in the bottom half the home team does the same. There is no limit on how long a half-inning takes. Three quick groundouts might take five minutes, while a half-inning with two walks, a pitching change and a home run can take twenty.
If the home team leads after the top of the ninth, the game ends there, since the home side does not need to bat. If the home team takes the lead in the bottom of the ninth or later, the game ends the moment the winning run scores. That is why a typical game is really eight and a half or nine innings long, and why box scores sometimes show an X in the last frame.
How long is a baseball game today?
Game times crept up for decades as pitchers took longer between pitches, hitters stepped out of the box, and teams used more relievers. The average nine-inning game hit a record 3 hours 10 minutes in 2021 and was still 3 hours 4 minutes in 2022.
Then MLB added a pitch clock for 2023: 15 seconds between pitches with the bases empty and 20 seconds with runners on. The average nine-inning game dropped to 2 hours 40 minutes that season. For 2024 the clock with runners on was cut to 18 seconds, and the average fell to 2 hours 36 minutes, the shortest since 1984. In 2025 it came in at 2 hours 38 minutes. Those are nine-inning averages from full regular seasons; figures for the season in progress are not final until it ends.
For a fan planning an evening, that means a 7:05 p.m. ET first pitch usually wraps up by around 9:45. Extra innings, a lot of pitching changes or a long rain delay can still push it much later.
Extra innings and the automatic runner
If the score is tied after nine innings, the teams keep playing complete innings until one side leads at the end of one. In the regular season, each extra half-inning starts with a runner on second base, and that runner is the player in the batting order just ahead of the inning’s leadoff hitter. MLB introduced the rule in 2020 and made it permanent from 2023, with the stated aim of ending tied games sooner and sparing pitching staffs.
The rule does not apply in the postseason. October games go back to the old format, where every extra inning starts with the bases empty. That is how you get the occasional 15- or 18-inning playoff marathon.
For a sense of the extremes before the rule existed: the longest game by innings went 26, between the Boston Braves and the Brooklyn Robins on May 1, 1920. It ended 1-1 when darkness stopped play. The longest by the clock was a 25-inning game between the Chicago White Sox and Milwaukee Brewers on May 8 and 9, 1984, which took 8 hours 6 minutes and ended on a Harold Baines home run.
Rain, suspended games and doubleheaders
Weather is the other big variable. A game becomes official, which the rulebook calls a regulation game, once five innings are complete, or four and a half if the home team is ahead. If rain stops play after that point and the game cannot be resumed, the score stands.
Before 2020, a game halted before it became official was wiped out and replayed from the start. Since 2020, regular-season games stopped by weather before that point are treated as suspended and picked up later from the exact point where they stopped, often before the next scheduled game between the same teams.
Doubleheaders are two games on one day, usually because of an earlier postponement. In the 2020 and 2021 seasons they were shortened to seven innings each. That ended in 2022, and both games are now nine innings again. A split doubleheader, with separate tickets for each game, can stretch across an afternoon and evening.
How long is the postseason?
The playoff bracket has 12 teams since 2022. The Wild Card Series is best of three, the Division Series best of five, and the League Championship Series and World Series are both best of seven. A club that plays the maximum at every stage could need 22 games to win a title. Individual games run longer than in the regular season because of extended TV breaks, more pitching changes and no automatic runner in extras.
When a bet becomes official
The regulation-game rule matters for bets, but sportsbooks write their own house rules, and they are not all the same. A common approach: a moneyline bet has action once the game is official, at five innings or four and a half with the home team ahead. Run lines and totals often need a full nine innings, or eight and a half if the home team leads, because a shortened game changes how many runs can score. A suspended game that is finished later may be settled differently from book to book. Read the house rules before you bet in the rain; our rules guide covers the common ones.
A first 5 innings bet sidesteps some of that. It is settled on the score after five innings, which is also the point where the starting pitchers usually hand the game to the bullpen. That is why first 5 markets are built around the starters, and why our MLB probable pitchers page is the first place to look before one. The NRFI market goes even shorter: it is settled after one inning, often within twenty minutes of first pitch.
The pitch clock also changed live betting. With about 15 to 18 seconds between pitches, prices update faster and the window between a key moment and a new line is short. If you bet in-game, decide your numbers before the inning starts, not after the count goes full. The extra-inning runner matters for totals and over/under bets: if a game goes to the 10th, the runner on second makes a run much more likely, so a total that looked safe at the end of nine can go over quickly.
To check what a live price implies, the betting calculators convert American odds into a break-even percentage in a second, and our guide to baseball betting lines explains how moneylines, run lines and totals relate. Set a budget before you start and stick to it; sports betting is for adults 21 and older, and 1-800-GAMBLER is free and confidential. For the rest of our guides, start at the homepage.
