Which is the best college football conference in 2021?

AnalysisAll analysis →

Every FBS team is a dot. Conference averages are not shown, and that is the point: the SEC’s mean is dragged up by four teams, the Big Ten’s spread is twice the Sun Belt’s, and a bar chart of means says none of it. What “compare the conferences” actually asks is how much of one league sits inside the other.

MetricCORE overallCORE offenseCORE defenseOffense EPA/playDefense EPA/play allowedOffense success rateOffense explosivenessPoints per drivePoints per drive allowedAverage starting field positionThird down conversionTeam talent composite

Season2026202520242023202220212020201920182017201620152014

Defense EPA/play allowed · 2021

One dot per team, one tick per conference median. Leagues are ordered by median, and the mean is deliberately not shown — four teams drag it and it hides how far the two distributions overlap.

All leagues ACC American Athletic Big 12 Big Ten Conference USA FBS Independents Mid-American Mountain West Pac-12 SEC Sun Belt

Conference	Teams	Median	Spread	Best	Worst
Big Ten	14	0.149	0.094	Wisconsin -0.028	0.266
Sun Belt	10	0.152	0.131	App State 0.077	0.344
SEC	14	0.154	0.077	Georgia -0.062	0.316
Mountain West	12	0.155	0.044	San Diego State 0.046	0.248
Conference USA	14	0.163	0.130	Marshall 0.109	0.379
ACC	14	0.174	0.123	Clemson 0.021	0.383
American Athletic	11	0.190	0.100	Houston 0.041	0.325
Pac-12	12	0.195	0.069	Arizona State 0.108	0.314
Big 12	10	0.202	0.116	Oklahoma State 0.015	0.434
FBS Independents	7	0.225	0.224	Notre Dame 0.068	0.404
Mid-American	12	0.253	0.081	Toledo 0.019	0.371

Two numbers, not one

Median answers “how good is this league”. Spread — the interquartile range — answers “how evenly good”, and it is usually the more interesting of the two. A league with a high median and a huge spread is four contenders and eight teams padding their records, which is exactly the shape that produces a conference champion who keeps losing in January.

Note which metric you are looking at. CORE is opponent-adjusted, so it can be compared across leagues honestly. The raw metrics cannot: a conference that plays itself twelve times has its schedule strength baked into every raw number, which is the single most common way conference comparisons go wrong.