Jim Harbaugh did not feel like talking about Michigan running back Ty Isaac’s situation.

The USC transfer was not listed on the team’s depth chart on Monday. He also didn’t play on Saturday against Minnesota despite the fact that Michigan starter De’Veon Smith struggled.

Naturally, the media was curious about why the former five-star recruit wasn’t anywhere to be found on the team’s depth chart or injury report. Harbaugh said that it was an “internal matter.”

“I’ll keep you posted,” he said. “(It’s) none of your business … that’d be another way to say it.”

It’s an interesting development for a guy that has a 100-yard game to his credit this season. In the five games since his breakout 114-yard performance against UNLV, however, Isaac only has 12 total carries. Despite his recent work, Isaac is still second on the team in rushing and is first among tailbacks in yards per carry.

He registered his first ‘DNP’ on Saturday against the Gophers. With roster sizes limited for road games, it would’ve been an odd move to have him active without any intention of playing him on Saturday. If there’s a suspension, it hasn’t been made public.

Listed on the Michigan depth chart at running back (in order) was Smith, Drake Johnson, Derrick Green and freshman Karan Higdon. The Wolverines’ rushing attack was held to a combined 2.8 yards per carry in the last two games.

Seemingly without Isaac, Michigan will look to turn that around on Saturday against Rutgers.