My thought is if you drop one of the next two, especially at Wisconsin, the OSU game becomes a little bit of a must. Lose @NW or @Wisconsin but beat OSU, still a lock to make the tournament even if you lose at PSU and Maryland.
Lose one of the next two, drop to OSU, then it’s very much tempting fate by losing to PSU and Maryland. I personally still think they’d make it but could be in the play-in game. (Ignoring the BTT Tournament possibilities) Would definitely be a stressful Selection Sunday.