(07-06-2022, 11:51 AM)TrumpCard Wrote: Although I agree with almost everything above, I want to note that Reynolds, the DL, and the Stanford defense in general might have been better in 2017 than we're acknowledging. The defense did give up too many points in early games against UCLA and USC, but note that those team both had top 10 NFL draft picks at QB that year. Also, Jackson and Cotton were rounding into form by midseason, and I was cautiously optimistic. Even after Cotton went down in the close loss to WSU, the DL and the defense were pretty resilient and won two games against top 10 teams (UW and ND). Stanford ended the regular season 9-3 and gave up more than 24 points only twice in those two early games against elite QBs. If not for Cotton's injury, I think Stanford's defense would not have fallen apart in the post-season, and I think the team would have won the Pac-12 title, or if not, at least the team would have won the Alamo Bowl. Going 1-1 in the post-season would have meant a 10-win season and a top-15 ranking in the final polls. That would have changed the narrative a lot, and I think the defensive stats would have looked better too.
Good observations. The best way I know of to assess single-game effectiveness and trends over time, at least in a way that accounts for strength of competition and such, is to look at yards per play allowed compared to what the opposing offense typically mustered. Here's what 2017 looked like:
Rice - 3.89 (1.55 better than Rice's average)
USC - 8.42 (1.87 worse than USC's average)
San Diego State - 4.53 (1.76 better than San Diego State's average)
UCLA - 7.93 (1.54 worse than UCLA's average)
Arizona State - 5.76 (0.05 worse than Arizona State's average)
Utah - 5.23 (0.41 better than Utah's average)
Oregon - 5.52 (0.58 better than Oregon's average)
Oregon State - 4.19 (0.99 better than Oregon State's average)
Washington State - 5.58 (0.02 worse than Washington State's average)
Washington - 5.80 (0.62 better than Washington's average)
Cal - 5.91 (0.74 worse than Cal's average)
Notre Dame - 5.68 (0.71 better than Notre Dame's average)
USC - 7.48 (0.93 worse than USC's average)
TCU - 7.28 (1.19 worse than TCU's average)
Exactly half the games were better than defenses tended to do against the opponent and half worse. Cotton got hurt early in the Notre Dame game and at the time I certainly shared your sense that that hurt the defense in the Pac-12 championship and Alamo Bowl, both of which were not good defensive performances compared to those opposing offenses' norms. Then again, USC roasted us even worse early in the season compared to the Pac-12 championship game. All in all, I think the verdict of the advanced metrics I cited (#52 in Defensive FEI) is a fair representation of the quality of that defense. It was a bit above-average, I think. Considering there were 7-9 NFL players (depending on how you count guys who briefly made rosters but never played in the league) who all played 200+ snaps that year.....yikes, holy underachievement, Batman.
On the other point of how close the narrative was to being much different.....yes, great point. There were a lot of things that year that if they had gone differently we're talking about an indisputably great season. Make Costello QB1 at the beginning of the season and it's hard to see San Diego State being a loss. Cotton's injury, as you mentioned. The goal line heartbreak against USC in the Pac-12 championship. Justin Reid getting hurt in the Alamo Bowl. And many more I'm not remembering. Easily could have been a 10+ win season. That being said, for what it's worth I do view that as a great season and it's not part of my narrative of Shaw's overall decline except in the sense that it's evidence of defensive decline that such a talented defense was only a bit above-average. That team was really good overall, as was the TCU team we played in the bowl, and it easily could have been a 10 win season. 2018 is where to demarcate the real decline. But these observations on defensive decline we're all making in this thread speak to the fact there were warning seasons before the chickens came home to roost. 2015 was one of our greatest all-time seasons and 2017 was pretty high up there too yet both presented evidence of troubling defensive decline.