MLB Postseason Format Explained: From the Wild Card Series to the World Series
Twelve teams, two byes per league and four rounds that get longer as October goes on. This is how baseball crowns a champion.
A 162-game season produces 12 playoff teams and, about a month later, one champion. MLB has used its current postseason format since 2022. Here is how it works, round by round.
Who gets in
Each league, American and National, sends six teams: the three division winners and three wild cards, the best records among the remaining clubs. The two division winners with the best records receive the top two seeds and a bye. The third division winner is the No. 3 seed, and the wild cards are seeded 4 through 6 by record.
Ties for a playoff spot are no longer settled with an extra game. Since 2022, MLB breaks them with a formula that starts with head-to-head record between the tied clubs and moves on to records within the division if needed.
Round by round
| Round | Format | Home field |
|---|---|---|
| Wild Card Series | Best of three: No. 3 vs. No. 6, No. 4 vs. No. 5 | Every game at the higher seed |
| Division Series | Best of five (2-2-1) | Higher seed |
| League Championship Series | Best of seven (2-3-2) | Higher seed |
| World Series | Best of seven (2-3-2) | Better regular-season record |
The bye is a trade-off
The top two seeds skip the Wild Card Series, which saves their pitching and spares them a short, high-variance series. They also sit idle for several days while their opponents stay sharp. Whether rest or rhythm matters more is one of October's favorite arguments, and recent results have backed both sides.
Why short series feel chaotic
Baseball's best teams win about six games in ten over a full season. In a best-of-three, even a strong favorite has a real chance of going home after two bad nights. That built-in randomness is why seeding helps, but never guarantees, a deep run.
The World Series
The two pennant winners meet in a best-of-seven World Series, typically starting in late October. Home-field advantage goes to the club with the better regular-season record, no longer to the league that wins the All-Star Game.
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