2017 season. My school was left out at 12-1, in favor of Bama, after a close (27-21) loss to OSU in the B1G CCG.
Both were 0-1 against the top-10 that season, after the CCG's, and both were 3-1 against the top 25. Both lost their last games prior to the postseason. They had very similar SOS rankings at that time.
Bama didn't win its division. Wisconsin did.
Of course, Bama got hot and won the MNC anyway, but I think UW should have been in, despite losing in the CCG.