I checked the forum and don't think this has been posted yet, but Bill Landis of cleveland.com is reporting that Nick Conner is medically disqualified and not on the roster anymore due to knee injuries:

http://www.cleveland.com/osu/2018/03/linebacker_nick_conner_medical.html

Mod Edit:  Closing--Comments can be directed here: 

https://www.elevenwarriors.com/ohio-state-football/2018/03/91562/nick-conner-medically-disqualified-from-ohio-state