How Long Is a Major League Baseball Season?

By Sarah Miller · April 11, 2054

The Major League Baseball (MLB) regular season typically spans 183 days, running from late March or early April through late September or early October. Each of the 30 teams plays a 162-game schedule, resulting in one of the longest seasons among professional sports leagues worldwide.

Understanding the MLB Season Structure

The Major League Baseball season is structured into three main phases: Spring Training, the Regular Season, and the Postseason. Each phase serves a distinct purpose in player preparation, competitive play, and championship determination.

Key Phases of the MLB Season

Spring Training: Begins in mid-February and lasts about six weeks. Players report to training camps for physical conditioning, exhibition games, and roster evaluations.
Regular Season: Starts on Opening Day, usually the last Thursday in March or first Thursday in April. All 30 teams begin play on the same day or within a 24-hour window.
Postseason: Begins in early October and includes the Wild Card Series, Division Series, League Championship Series, and the World Series, potentially extending into November.

How Many Games Are Played in an MLB Season?

Each MLB team plays 162 games during the regular season. This high number distinguishes baseball from other major North American sports and allows for statistical consistency and reduced impact from short-term performance variance.

Breakdown of the 162-Game Schedule

The 162-game format has been standard since 1961 for the American League and 17 years later for the National League. The current scheduling format, updated in 2023, balances interleague and intradivision matchups.

19 games against each of their 4 division opponents (76 games)
6 or 7 games against each of the 10 non-division opponents in their league (64 games)
Interleague play: 46 games against all 15 teams from the opposite league

Season Year	Opening Day	Last Regular Season Game	Total Days	Teams	Games per Team
2025	March 27	September 28	186	30	162
2024	March 28	September 29	185	30	162
2023	March 30	October 1	185	30	162
2022	April 7	October 5	180	30	162
2020	July 23	September 27	66	30	60

Table data source:1, 2

The table shows that recent MLB seasons average around 183–186 days, with 2020 being a significant outlier due to the pandemic-shortened 60-game season. Since 2022, MLB has expanded interleague play and standardized the 162-game schedule across all teams, enhancing competitive balance and fan engagement throughout the season.

Factors Influencing Season Length

Several logistical and strategic factors determine the length of the MLB season:

Weather constraints: Most teams are based in regions where early spring and late fall weather can affect outdoor playability.
Player workload management: The grueling 162-game schedule necessitates careful rotation of pitchers and rest days.
Broadcast scheduling: Games are strategically placed on weekends and holidays to maximize TV viewership.
Travel demands: With teams spread across North America, travel time between cities affects scheduling density.

Postseason and Championship Timeline

After the regular season concludes, the top six teams from each league advance to the postseason. The playoff format includes:

Wild Card Series (best-of-three)
Division Series (best-of-five)
League Championship Series (best-of-seven)
World Series (best-of-seven)

The postseason typically begins on October 1 and can extend to early November, especially if the World Series goes to a seventh game. The 2023 World Series ended on November 1, highlighting how far into the calendar the championship can stretch under optimal conditions.

Frequently Asked Questions About the MLB Season

How long is the MLB regular season in days?

The MLB regular season lasts approximately 183 days, starting in late March and ending in late September or early October. For example, the 2025 season runs from March 27 to September 28, totaling 186 days of play.

Why does MLB play 162 games per season?

MLB plays 162 games to minimize the impact of randomness and ensure that the best teams advance. The lengthy schedule allows for greater statistical reliability in player and team performance evaluation over time.

Do all MLB teams play the same number of games?

Yes, since 2023, all 30 MLB teams play exactly 162 regular-season games. Prior to this, slight variations occasionally occurred due to weather cancellations, but make-up games ensure near-universal completion.

Has the MLB season always been 162 games long?

No. The 162-game season began in 1961 for the American League (after expanding to 10 teams) and was adopted by the National League in 1962. Before that, teams played 154 games per season from 1904 to 1960.

Can the MLB season extend into November?

Yes, the MLB postseason can extend into November, particularly if the World Series reaches Game 7. The 2023 World Series concluded on November 1, marking the latest possible end under current scheduling rules.