Playoff Odds

What are Playoff Odds?

Playoff Odds represent the probability that a team will make the playoffs at any point during the season. Updated after every week, they account for current standings, remaining schedule, and each team's scoring strength to simulate thousands of possible season outcomes.

League History displays playoff odds as a percentage from 0% to 100%. A team with 73% playoff odds has made the playoffs in 73% of simulated season outcomes.

How Playoff Odds are calculated

Playoff Odds are powered by a Monte Carlo simulation engine that runs 10,000 complete season simulations from the current week forward.

Step 1: Model each team's scoring strength

Before simulating games, the system builds a statistical model of each team using Bayesian shrinkage with exponential recency weighting.

Recency weighting: Recent games matter more than old ones. The system uses an exponential decay with a half-life of 14 weeks, meaning a game from 14 weeks ago carries half the weight of last week's game. Games from the prior season are further penalized during the early weeks of the current season, then gradually trusted more as the new season progresses.

Bayesian shrinkage: Early in the season, when teams have played only a few games, the model blends each team's observed performance toward the league average. This prevents extreme predictions based on small samples. The system uses 5 pseudocounts of shrinkage — effectively treating each team as if they've played 5 games at the league average before the season started. As more real games are played, the shrinkage effect fades and each team's actual performance dominates.

Variance modeling: Each team's scoring volatility is estimated and floored at 80% of the league-wide standard deviation. This prevents the model from being falsely certain about any team's future output — even a consistent team has a meaningful chance of a high or low scoring week.

Step 2: Simulate remaining regular season games

For each of the 10,000 simulations:

1. Look at every remaining matchup on the actual schedule
2. Draw a random score for each team from their statistical model (using bootstrap resampling from actual past scores when 3+ games exist, or a normal distribution otherwise)
3. Determine the winner of each matchup
4. In H2H + Median leagues, also check if each team scored above the league median for bonus wins
5. Add simulated wins and points to each team's current totals

Step 3: Determine playoff seeds

After simulating all remaining regular season games, teams are ranked by:

1. Total wins (descending)
2. Total points scored as tiebreaker (descending)

The top N teams make the playoffs, where N is the league's playoff team count (typically 4, 6, or 8).

Step 4: Count playoff appearances

Across all 10,000 simulations, count how many times each team made the playoffs. Divide by 10,000 to get the probability.

Step 5: Normalize probabilities

Raw simulation counts are smoothed through a normalization process:

• Early-season compression: In weeks 1-4, probabilities are blended toward the neutral rate (e.g., 50% in a 6-of-12 playoff league) to avoid overconfident early predictions. Confidence reaches 100% by week 5.
• Sum normalization: Playoff odds across all teams are scaled so they sum to exactly (number of playoff spots x 100%). In a 12-team league with 6 playoff spots, the sum is always 600%.
• Hierarchy enforcement: A team's championship odds can never exceed their odds of reaching the finals, which can never exceed their semifinal odds, which can never exceed their playoff odds.

How Playoff Odds evolve through the season

Related metrics

• Playoff Seed Distribution: Beyond yes/no, the system tracks the probability of each team landing at each seed (1st through last playoff spot)
• Bye Probability: In leagues with first-round byes, the probability of earning a bye is tracked separately
• [Championship Odds](/research/glossary/championship-odds): Extends the simulation through the playoff bracket to estimate the probability of winning it all

See playoff odds in your league

Import your league for free to see week-by-week playoff odds for every team across your league's entire history — including who was a lock, who was on the bubble, and who pulled off an improbable run.