Current Elo Ratings

What is an Elo Rating?

The Elo rating system is a method for calculating the relative skill levels of players or teams in zero-sum games (like soccer). It was originally invented for chess but is now widely used across many sports.

How it works: Every team starts with a baseline rating (in our system, 1500). After every match, the winning team takes points from the losing team. The number of points exchanged depends on the difference in their ratings before the match.

• If a higher-rated team beats a lower-rated team, only a few points are exchanged.
• If a lower-rated team pulls off an upset and beats a higher-rated team, a significant number of points are exchanged.
• In the event of a draw, the lower-rated team will gain a small number of points from the higher-rated team.

The K-Factor (Volatility)

A crucial part of any Elo system is the K-factor. This is a multiplier that determines the maximum possible rating change in a single match. In our La Liga model, we use a K-factor of 32.

To put this in perspective, international chess often uses a K-factor of 10 for top-tier Grandmasters (meaning their ratings are very stable and hard to change), and 40 for brand new players (meaning their ratings swing wildly until they find their true skill level).

A K-factor of 32 for soccer strikes a balance: it's large enough to quickly reward teams for sudden improvements in form (like a new manager bounce or key signings), but stable enough that a single lucky win doesn't completely rewrite a team's historical standing.