Jim Harbaugh thought he was being pranked on the phone.

"Come on," Harbaugh said. "Come on! Who is this, really?"

"This is Michael Jordan," the caller repeated.

Last summer, the greatest basketball player of all time was calling to propose a business opportunity that the second-year Michigan head coach couldn't refuse: for the Wolverines "to be the first and only football school, program, in the world to be Jordan," Harbaugh said, according to Bleacher Report - College Football
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