How MLB Tiebreakers Work
Game 163 is gone. Here is the ladder of criteria that now settles level finishes in the standings, for two clubs, for three, and for division and Wild Card races.
For most of baseball history, a tie at the top of the standings was settled the obvious way: play another game. That is over. Ties are now resolved on paper, before the bracket is drawn, using a fixed ladder of criteria. It takes about five minutes to learn and it quietly changes how you should read a pennant race in April, never mind September.
What replaced Game 163
Under the collective bargaining agreement that took effect for the 2022 season, MLB stopped scheduling tiebreaker games. There is no longer a play-in to decide a division, and no longer a play-in to decide a Wild Card place. MLB's own explainer is blunt about it: tiebreaker games are no longer used to resolve ties in the standings at the end of the regular season, which means no more Game 163.
The reason was scheduling. The postseason had just expanded to 12 clubs with a best-of-three first round, and there was no room left in October for extra regular-season games without pushing the World Series deep into November.
The trade-off is that a tie now has to be broken by something that already happened. And the first thing MLB reaches for is the games the tied clubs played against each other.
Two clubs tied: the ladder
When two clubs finish level, the criteria are applied in this order, stopping as soon as one separates them.
- Head-to-head record. Whoever won the season series between the two clubs takes the spot.
- Intradivision record. The better record in games against clubs in their own division.
- Intraleague record. The better record in games against clubs in their own league.
- The last half of intraleague games. The better record over the back half of each club's schedule against league opponents.
- The last half plus one. Add the next intraleague game back into the sample and compare again, then the one before that, working backwards one game at a time until the tie breaks.
Head-to-head does most of the work, because tied clubs have usually played each other enough times during the season for one of them to have won the series. Step two picks up most of what is left.
The jargon is worth pinning down, because the two middle rungs sound alike. Intradivision means games inside your own division. Intraleague means games against everyone in your own league, division rivals included, which is to say everything except interleague play.
The rung that surprises people
Step two applies even when the two tied clubs are in different divisions.
That sounds odd at first. If an East club and a West club finish level for the last Wild Card place and split their season series, the tie is decided by how each of them fared against its own division, against two completely different sets of opponents. Nobody pretends this is a like-for-like comparison. It is a rule, applied consistently, chosen because it is unambiguous and known in advance.
The practical lesson: beating up on your own division has value beyond the win column, and a bad April inside the division can cost a club a postseason place six months later without anybody noticing at the time.
Three clubs tied
Three-way ties branch depending on how the clubs did against each other.
If the three clubs have identical records against one another, the tie is settled by:
- Highest winning percentage among the three in intradivision games
- Then highest winning percentage in intraleague games
- Then the last half of intraleague games
- Then the last half plus one, working backwards
If they do not have identical records against each other, the club with a better record against both of the others qualifies. If no single club has beaten both, the three are ranked by their overall winning percentage in games against the other two combined, and from there the two-club procedure resolves whatever is left.
Four or more clubs tied
The same shape, one step wider. First, a club with a better record against each of the other three takes the top spot. Then the clubs are ranked by winning percentage in games among the tied group. Then intradivision record. Then the ladder continues as before.
Division titles are settled first
When a tie spans a division title and a Wild Card place, the order of operations matters. The division champion is decided first, using the criteria above. Only then do the remaining clubs drop into the Wild Card queue and get sorted by the two-club procedure.
This is not a formality. A division title carries a top-three seed and, if the record is good enough, a first-round bye. The club that loses the division tiebreaker does not lose its season, but it does lose several rungs of the ladder, and it usually lands in a best-of-three on the road. The full bracket is laid out in how the MLB postseason works.
The same rules set the seeds
It is easy to think of tiebreakers as a qualification question only. They are not. MLB applies the same criteria when two clubs tie for two spots, or three clubs tie for three spots, and the exact seeding has to be resolved. Two clubs that both make the field but finish level still need separating, because one of them is going to host a series and the other is going to travel.
So a tiebreaker you never hear about on the qualification side can still decide who plays a Wild Card Series at home.
What this changes about watching a season
Three things, really.
Every head-to-head game is a two-way lever. A win over the club immediately behind you moves your own win column and their loss column at the same time. That has always been true for the standings; now it also banks a tiebreaker.
Clinches arrive slightly earlier than the raw arithmetic suggests. If a club has already won the season series against its nearest pursuer, finishing level is good enough, so it does not need to finish ahead. That knocks one off the effective magic number. We work through the arithmetic in magic numbers explained.
There is no extra day. The regular season ends and the bracket is set. If you are watching the last weekend of the season hoping for a Monday play-in, there isn't one.
One thing this post deliberately does not do
It does not tell you who currently holds which tiebreaker. Those change constantly through the season and depend on season series that may not be finished. The live standings and Wild Card standings are the place for that. This is the rulebook, not the scoreboard.