Rebuilding the Playoff Format
How we moved from a flat 8-seed bracket to a two-conference, three-division format — and why it made September mean more.
The v1.0 playoff format was a flat 8-team bracket. The top 8 records made it, seeded 1-through-8, and away we went. Clean, but boring. September wasn't tense — a good team knew by August it was in, and a middling team knew it was out.
v1.2.1 rebuilt the format from scratch.
The new structure
30 teams, split into two conferences of 15. Each conference has three divisions: North, Central, South. Four teams from each conference make the playoffs:
- Three division champions (automatic bids)
- One wild card (best remaining record)
That's 8 total, same as before. But the road to get there is dramatically different.
Why divisions matter
Under the flat format, a 92-win team in a strong conference was safely in. Under the new format, that same team might miss the playoffs entirely if it finishes second in its division and behind another division's runner-up in the wild-card race. Suddenly the standings page has stakes on every line.
Divisional games get weighted implicitly — you play your division rivals more often, so a bad divisional record is hard to overcome. The wild card slot turns July trade-deadline decisions into real gambles.
What we watched during testing
We ran 100 simulated seasons before shipping the new format. A few things jumped out:
- Average September competitiveness (teams within 3 games of a playoff slot) rose from 12 to 17.
- Wild-card races went to the final week 74% of the time.
- Division champions had a meaningfully higher World Series win rate (bye value is real).
Watch the standings differently now
If you're used to the flat format, the biggest change is where you look. The old standings page was one long list. The new page shows six division standings, then a wild-card race that draws from all six. It takes a couple of seasons to internalize, but by year three you'll never want to go back.