Sources to @TomVH and me: B1G received documents from Michigan that U-M says show Ohio State, Rutgers and Purdue communicated about U-M's signals in 2022. Docs show Purdue, which faced U-M in B1G champ game, got offense signals from Ohio St + D signals from Rutgers, per sources.

— Adam Rittenberg (@ESPNRittenberg) November 7, 2023