It was a colossal beat down on the ground, and Michigan's once fearsome defensive line was ripped apart and its linebackers run past. Indiana doubled up the best rushing total allowed by Michigan's defense so far this year.
So what went wrong?
Pretty simply, Michigan got tired. But there is a little more to it than that, so let's dive in.
The Ryan Glasgow injury was troubling before this game, but now it seems to be a five alarm fire. He has been the point man for Michigan's crushing rush defense, and his presence was missed. One of the biggest advantages Michigan has had on defense this year is its ability to outwork opponents. That starts up front with a defensive line that ran a legitimate two deep at all three interior spots. Michigan's depth up front allowed the Wolverines to run out different packages, rotate players consistently to keep them fresh, which allowed everyone to thrive. This wasn't a Mike Martin/Ryan Van Bergen ironman competition like the 2011 season, but what would happen if you cloned those guys twice over and then rotated all six of those clones through. If you haven't guessed, this isn't a luxury that most teams are afforded.
Glasgow's presence on the field cut Maurice Hurst's time in half, but effectively doubled his effectiveness by allowing him to focus more energy on fewer plays. With Glasgow on the shelf, Hurst had to shoulder a larger share of the defensive load. The defensive coaches did throw Tom Strobel into the rotation at nose tackle, but Strobel is a positional vagabond and a massive step down from Glasgow.
The line is also down two other rotation players in Bryan Mone (lost before the season) and Mario Ojemudia (season ending Achilles injury), and suddenly what was the strength of the team looks to be fraying at the edges under the heavier workload. Matt Godin has also been banged up, and with Glasgow out both Willie Henry and Chris Wormley have had to play more.
This was all exacerbated by Indiana's tempo offense which eschews huddles and effectively locks opposing lineups on the field for multiple plays at a time before substitutions can happen. It is one thing to play Tom Strobel a handful of times to give Hurst a blow. It is another thing entirely when the opposing offense can dictate when you can sub him off the field thanks to its offensive philosophy.