This is from last year. Fox gets the first three picks in their weekly draft.
https://www.seattletimes.com/sports/uw-husky-football/heres-how-the-big-tens-in-season-tv-football-selection-process-works/
As policy, the Big Ten does not discuss specific parameters related to the broadcast windows. But based on published interviews with Fox executives and color analyst Joel Klatt, we know the following:
Fox, the Big Ten’s primary media partner, owns the first three selections in the weekly draft. (Note: The networks choose dates, not specific games.)With the first pick, Fox naturally chose Nov. 30 to ensure that it will broadcast Ohio State-Michigan, the most coveted regular-season game in college sports.
With the second pick, Fox selected Sept. 7, allowing it to secure the Texas-Michigan showdown.
Fox traded the third pick to NBC in exchange for better options lower in the weekly draft. Not surprisingly, NBC used the No. 3 pick for Oct. 12, the date of Ohio State’s visit to Oregon.