Rex Ryan has taken the blame for a Buffalo Bills defence that has not lived up to the pre-season hype.
The Bills coach summed up the unit, that ranks 30th in sacks this season, telling the Buffalo News: "We haven't been the dominant unit any of us anticipated."
"I set the expectations high, but I always set them high," said Ryan, whose team were beaten 23-20 by the Philadelphia Eagles last weekend. "I'm the guy it should fall on. I don't point fingers."
"This is the first time I've ever been considered the weakness of the team, the way I coach defense."
Rex's renowned blitz scheme has produced just 19 sacks over the whole season, despite having a roster that includes Mario Williams, Marcell Dareus, Jerry Hughes and Kyle Williams, before the latter suffered a season-ending knee injury.
With the same players, ex-coordinator Jim Schwartz managed to get his team to produce 54 sacks and Ryan admitted: "The stats are ugly. We don't expect to get the numbers like that. It's certainly not what we expected.
"Maybe I set the expectations too high, so that's my mistake."
The 6-7 Bills face the Washington Redskins this weekend and need a win to keep their slim play-off hopes alive.