As I mentioned, it's 2nd and 21 after a Michigan sack. Michigan is showing a cover-3 look with a three-man rush and five underneath defenders. Penn State comes out with three receivers in an I-formation. They'll run play action, send their wide receivers down the field, and drag the slot receiver across the formation. James Rogers, Ray Vinopal, and JT Floyd will split the field into deep thirds. In what is very likely a passing down, Michigan has essentially eight men in the box.
Penn State runs play action. You can see Michigan's underneath defenders are all frozen in place, and all of which are between the hashes (!!). PSU's outside receivers are running straight downfield and the slot receiver is starting to come across the formation. While Michigan is susceptible to an easy 10-yard hitch route on this play, that's actually what they're hoping for: force PSU into a third and long and look for a stop then. This is where things get really ugly though.
At this point, Kovacs realizes how poorly he's executed this play and has turned his head away from the quarterback to try and catch up with the outside receiver. Michigan's linebackers are literally running into each other and covering no one (What's happening here?). Michigan's underneath defenders are all still essentially inside the hash marks and none of them are deeper than five yards beyond the line of scrimmage. McGloin has all day to throw because, well, seven blockers against three rushers won't ever get to the quarterback.
The ball is released (in red) and three of the five underneath defenders have now gotten good depth--the problem is they should have gotten this deep shortly after the ball was snapped. Instead, they're terribly out of position and no where near any of PSU's receivers. Then...
...there is a wide open PSU receiver just past the sticks with the closest Michigan defender 10 yards away. You might be asking yourself, "How did that guy get so open on a two-receiver route against cover-3?" Let's look:
Floyd is in pretty good position as the deep safety. Despite not having any underneath help because his underneath defenders are woefully out of position, he's keeping the play in front of him and in position to force the play toward his help defense (Ray Vinopal in the deep middle of the field). Then...
...the PSU receiver takes one stop toward the inside of the field and then breaks to the outside. Floyd immediately turns his back on the play to run with the receiver to the inside, despite having help defense toward the middle of the field. By the time Floyd gets his head turned around, the receiver has settled into a completely vacated zone 22 yards down the field and makes the first down catch.
Absolutely everyone involved in this play is to blame, but almost all of it has to fall on Greg Robinson. These players have absolutely no idea what they're doing here. The underneath defenders get no depth. Floyd doesn't know where his help defense is and once again shows how poor his technique is (like on those wide-open slants against Iowa) by turning away from the play. I mean, this is 2nd and 21 against a walk-on quarterback in the second drive of his first career start. How does this happen?
You can say that the players didn't execute here, and that you can't blame this on Robinson when we don't know exactly how they were coached, but the massive amount of basic error is unfathomable for a team in its 8th game of the season, regardless of whether or not these are freshmen or seniors. I honestly don't know how a defense can be this clueless. No one on the field appears to know where they're supposed to be or how they're supposed to defend this. When this play was taught, what exactly did Robinson see that made him think, "Yes, that will work"? This is not a complex play with pattern reading or man coverage or stunts. This is a three-man rush with five underneath defenders and three deep safeties. Penn State sends only three receivers. And this isn't even one of those broken plays where defenses are forced to cover for too long. PSU's receiver ran 22 yards, stopped, and caught the football.
There's no way to watch this and conclude anything other than massive failing on the behalf of the coaching staff and that Michigan has the worst defense in the country. 2009 looms.