What SoS, OSRS, DSRS and SRS mean
These four numbers appear on every team card and game. All of them are in points per game compared with an average FBS team, so 0 is average, positive is better than average and negative is worse.
SRSSimple Rating System
The team's overall strength. It is based on points scored and allowed, adjusted for how good every opponent was. An SRS of +14 means the team is about 14 points better than an average FBS team on a neutral field.
SRS = OSRS + DSRS
OSRSOffensive SRS
The offense's share of SRS. It measures how many more points per game the team scores than an average team would, after accounting for the defenses it has faced. Higher means a better offense.
DSRSDefensive SRS
The defense's share of SRS. It measures how many fewer points per game the team allows than an average team would, after accounting for the offenses it has faced. The sign is flipped so that higher is better: +7 means the defense gives up about 7 fewer points than average.
SoSStrength of Schedule
The average SRS of the FBS opponents the team has played so far. Positive means a tougher-than-average schedule, negative means an easier one. It describes games already played, not the rest of the season.
Example: this week's top-rated team
Using them in a matchup
- Rough point spread: subtract one team's SRS from the other's. A +20 team against a +8 team projects as about a 12-point favorite on a neutral field. Add a few points for the home team, since the ratings themselves don't include home field.
- Where the edge is: compare one team's OSRS with the other team's DSRS. A strong offense facing a weak defense is where points are likely to come from.
- Grain of salt: check SoS. A big SRS built on an easy schedule rests on less evidence than the same SRS against strong opponents.
How this site calculates them
- Only 2026 regular-season games between two FBS teams count. Games against FCS opponents are left out of the ratings and out of SoS.
- Every team's offense and defense rating is solved at the same time so that, across all games, points scored ≈ average + the offense's OSRS − the opponent's DSRS.
- Margins are not capped, and there is no home-field adjustment.
- A small stabilizing term keeps the numbers from swinging wildly early in the season, when teams have few common opponents. It pulls ratings slightly toward 0.
- Ratings are rebuilt from scratch with every weekly update, so a team's SoS and SRS can change even in a week it doesn't play, as its past opponents' ratings change.
Early in the season, with only a few games per team, treat all four numbers as rough. They become more reliable as more games are played.