2025 FEI Defense Ratings

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FEI Defense Ratings (DFEI) are opponent-adjusted possession efficiency data representing the scoring advantage per non-garbage possession a defense would expect to have on a neutral field against an average opponent offense. The relative strength of opponent offenses faced (OOA) is the difference between DFEI and unadjusted defensive possession efficiency (DVE). Opponent offensive points per drive (DPD), available yards percentage (DAY), yards per play (DPP), and the percentages of opponent offensive drives that ended in a touchdown or field goal attempt (DSR), drives that ended in a touchdown (DTD), drives that earned at least 10 yards (DFD), and busted drives that were held to zero or fewer yards (DBD) are calculated from the results of non-garbage, regulation drives in FBS vs FBS games.