People are worried about the defense, and with good reason. The worrying bit isn't so much the best quarterback in the state averaging 5.9 YPA and being forced into two turnovers by getting clobbered, but rather Western Michigan running for almost 5 YPC with guards they picked up at a yard sale in Jackson.
I have good news and bad news about this. The good news: a major reason for these issues was a true freshman in his first game who made obvious errors. He fixed some of those errors. The bad news: he fixed those errors so hard he made the opposite error. More bad news: he wasn't the only culprit.
We're looking at two successful first-half counters run by the Broncos. Here's the first. It's second and two on the Michigan 47 on Western's second drive of the day. Western's all like "look, ma, I'm the 2010 Michigan offense" and Michigan brings out its aggressive one-high press man for the first time:
You see the 3-4 front with three tight corners. Kovacs is out of the picture deep. The slot "corner" is Thomas Gordon. The LBs from top to bottom are
Herron Jones, Johnson, Demens, and Beyer, with Roh/Martin/Van Bergen the DL. Your key players are the bottom three guys in the front seven: Beyer, RVB, and Demens.
A moment after the snap:
The tackle blocks down on RVB, leaving Beyer free to fly into the backfield. This is an Admiral Ackbar situation that Beyer is too pumped up on adrenaline and youthful stupidity to recognize. He's all like "gonna get me some QB."
Meanwhile, the RB is moving right, but check out that OL directly in front of the QB: he's pulling left. This is a counter.
A moment later Beyer is recognizing his DERP far too late. He's already three yards into the backfield and his momentum is stopped as he tries to change direction now that the QB doesn't have the ball. the pulling G is going to hammer him.
Not all is lost, though: Demens has read it and is moving into the hole. And you see a lot more of Van Bergen's jersey, don't you?
RVB has given about a yard but now has his helmet across his blocker. Beyer defeats the OG's block and would have a shot at a tackle if he hadn't flown upfield so fast. There's that lead blocker and a lot of room for Demens to close down but he could…
…just about turn it back inside to RVB, who has now totally defeated his block, or he could…
…turn into Jonas Mouton and lose leverage.
That's 25 yards before Kovacs can come up and save the bacon.
Video, with annotation!
I learned this from Spielman. There are two main ways to defend the power play: "squeeze" and "spill." Squeezing is getting into the guard upfield a bit so that the RB has to take it inside into a more restricted hole. Beyer would have to be a yard or two closer to the LOS and to the inside to be squeezing. From that spot he can make a play, or at least make it harder to burst outside that LB.
Spilling is kind of a scrape exchange type deal where the playside DE roars down the line at the pulling G and cuts his ass to the ground. This is intended to create a pile that takes out the other lead blocker and forces the running back to bounce outside, where a linebacker scraping over the top should clean stuff up. Beyer would have had to shoot directly at the G as soon as he reads the pull.
Obviously, he does neither and gets kicked out of a very large hole. If he's in the right position he's dealt with the block well enough to make a tackle. He's not.
Demens did Mouton it. He's got a tough job here with the fullback and a big hole, but letting the guy outside of you is a cardinal sin—unfortunately, one we're all too familiar with. If Demens gets outside that fullback WMU might get a big run anyway but "losing leverage" (the jargon) guarantees it.
Another quiet Van Bergen plus. This is the kind of thing I am talking about when I say RVB is good but the things he does often go for naught. Here he beats a downblock, which is tough, to show up in the hole and potentially rescue Johnson, who you may note ran ridiculously playside and ends up farther away from the play than double-teamed NT Martin. Demens loses the plot and Van Bergen's reward is just a UFR plus and a chase downfield.
Ugh Johnson. To reiterate: the guard directly in front of Johnson's face pulls and he ends up yards away from relevance.
Kovacs. He tackles. He does not not tackle. Here he sort of misses, but this was very rare. This may not hold up against Big Ten teams but there were plenty of opportunities for the Broncos to pick up a touchdown that they could not because Kovacs tackled them.