Jim Harbaugh heard back from the Big Ten.

And it sounds like the league admitted fault on the questionable holding penalty against Michigan running back Karan Higdon.

In his weekly interview with WXYT-FM (97.1 The Ticket), the Michigan football coach told the "Jamie and Stoney" show that he got an explanation from the league.

"They said, 'Sorry, we missed it?'" Harbaugh was asked.

"Yup," Harbaugh replied.

The Big Ten does not publicly comment on cases like these, but inquiries on penalties do happen on a regular basis. Harbaugh and Michigan often send in specific play calls to the league office in Rosemont, Ill., for an explanation.

"That is a penalty from Mars!"@joelklatt reacts to the game-changing holding call against Michigan. pic.twitter.com/HTwyHPYXkY — FOX College Football (@CFBONFOX) September 29, 2018

Of course, nothing else can be done. What is called on the field stands. But that fourth-quarter hold on Higdon, who was instead tackled by a Northwestern linebacker and thrown to the ground, had plenty of folks scratching their heads.

Harbaugh included. After the game on Saturday, one in which Michigan won, 20-17, he called it a "phantom call."

"I'd say it was the worst call in the history of college football -- since 1869," Harbaugh said on 97.1. "I'd put it right up there with it.

"We faked it to (Higdon) on a zone-read, Shea (Patterson) pulled it and ran for (20) yards and their linebacker tackled Karan Higdon and then threw him down to the ground. It was a heck of a fake by Karan."

Higdon, who ran the ball 30 times for 115 yards and two touchdowns in the game, said earlier this week he had re-watched the play more than once.

He had no choice -- people were sending it to him left and right.

"It's one of those things that I can't say happened," Higdon said. "I have no explanation for it."

The flag was one of 11 thrown against Michigan on Saturday, resulting in 100 penalty yards. The Wolverines (4-1, 2-0 Big Ten) this season have now been penalized 46 times for 421 yards, ranking them 122nd nationally in fewest penalty yards.