MLB's Wild Card Race: How Tiebreakers Are Decided

Why Tiebreakers Matter in Baseball

Every autumn, at least a handful of playoff spots come down to a handful of games — or even a handful of percentage points. In Major League Baseball, where 162 games are played across six months, two teams can legitimately finish with identical win-loss records. When that happens, something has to give. Understanding how MLB sorts those ties is essential for any fan watching the standings obsessively in September.

Unlike the NFL's playoff bracket system, which relies on win percentage and conference record as paper tiebreakers, MLB uses a layered set of criteria — and in some circumstances, an actual on-field game to settle the matter.

MLB's Official Tiebreaker Criteria, Step by Step

Before any game is played, MLB works through a sequential list of head-to-head and record-based criteria. Only if all paper tiebreakers fail to separate the clubs does a live game become necessary.

1. Head-to-head record: The season series between the tied teams is examined first. The club with the better record in those games earns the higher seed or the spot.
2. Division record: If head-to-head is deadlocked, MLB looks at each team's record against opponents within its own division.
3. Record vs. the opposite league: Performance against interleague opponents can come into play when earlier steps don't resolve the tie.
4. Record in the final half of the season: How a team performed over the back stretch of the schedule — often defined as the last 81 games — can serve as a late-stage filter.
5. Run differential in head-to-head games: The margin by which a team outscored its rival in their direct matchups may be applied.
6. Tiebreaker game(s): If all paper criteria are exhausted, MLB schedules a one-game playoff. This game counts as a regular-season contest for statistical purposes but determines playoff positioning.

It's worth noting that these criteria can shift depending on whether teams are tied for a division title, a Wild Card berth, or seeding within the Wild Card round. The division structure itself shapes which criteria apply first.

Memorable Tiebreaker Moments

History is full of late-September drama produced by these rules. The 1978 AL East tiebreaker between the Yankees and Red Sox — famously decided by Bucky Dent's improbable home run — remains one of baseball's most storied single games. More recently, the expanded Wild Card era has produced multi-team logjams where paper tiebreakers sorted seeds without a game ever being necessary.

The 2022 expansion of the Wild Card round to three teams per league added new complexity. Now a team might finish tied not for a berth but for seeding, which determines home-field advantage in the best-of-three Wild Card series — itself a dramatic format that rewards regular-season excellence. These stakes make late-season strategy a fascinating chess match, and coaches approach it very differently than earlier in the year — something explored in depth when looking at how teams shift strategies from regular season to postseason.

For fans who enjoy comparing tiebreaker systems across sports, it's illuminating to contrast MLB's approach with how overtime and tiebreaking work in other major American sports.