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

CORE defense · 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
SEC	14	-5.1	7.7	Georgia -29.2	11.0
Big Ten	14	-4.0	10.9	Wisconsin -20.1	8.9
Mountain West	12	-1.9	5.2	San Diego State -14.1	3.7
Big 12	10	-1.1	5.3	Oklahoma State -20.8	18.9
Pac-12	12	-0.500	5.8	Utah -9.4	5.7
American Athletic	11	0.180	8.0	Cincinnati -13.9	13.2
ACC	14	0.720	10.7	Clemson -15.7	14.9
Conference USA	14	2.0	10.2	UAB -3.9	23.7
FBS Independents	7	2.2	27.1	Notre Dame -10.5	23.4
Sun Belt	10	2.6	8.7	App State -10.4	16.4
Mid-American	12	7.9	9.6	Toledo -6.0	24.1

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.