Donevin O’Reilly suffered the injury during a non-contact special teams drill this week.
Ryan Buchholz started six games at DE in 2017, while Jordan Miner is second Nittany Lion in 2018 sidelined by heart issue.
Ayodele Adeoye, DeMarvion Overshown expected to contribute immediately in 2018.
Bobo remains hospitalized as he’s being treated for peripheral neuropathy.
6-4, 329-pound lineman was Big 12 co-Defensive Freshman of the Year after starting 14 games in 2017.