Do you know when he can come back? Not for this season, but I think getting him reps in prep for next season is really important.
All of you who thought that Drew 'Try Hard' Pyne was the answer are wrong. Buchner brings upside and a dimension to the offense that Pyne doesn't, but he clearly needs reps (I do wonder how he'd be looking 6 games in) in bowl prep would be really valuable.