Here's the really interesting part. Michigan's opponents have run the ball 103 total times through four games. Of those carries (which, in NCAA football, include sacks), a whopping 66 of them have gone for four or fewer yards, including negative-yardage plays (64.1 percent).
On those 66 total carries, opponents have amassed just 10 total yards. Ten yards on 66 carries.
On 64.1 percent of the rushes they've seen this season, the Wolverines have held opponents to 0.15 yards per rush.
Even when you take the sacks out of the equation, the numbers are still very impressive. Not counting sacks, the Wolverines have held 57 of 94 rushing attempts (60.6 percent) to four or fewer yards. On those 57 rushes, opponents have amassed a total of 72 yards (1.2 yards per rush).
The Wolverines have been very solid in the rare instances in which a running play does break out of the box, too.
Michigan has surrendered just 13 rushing plays all season that covered 10 or more yards, just four of which went for at least 15 yards. The longest rush on the year? 19 yards - the Wolverines are one of just seven teams in the country without a 20-plus-yard rush against it. Those seven teams have a combined 20-5 record.
They're also one of just three teams (Texas State, Iowa) without a rushing touchdown against it this season.