Koby Quansah and Brandon Hill saw significant playing time due to the injuries you cite above. Chris Rumph has been mentioned as a LB possibility plus redshirt freshmen Rocky Shelton and Shaka Heyward will be in the mix. There is no doubt we will miss Joe Giles-Harris and Ben Humphreys but the cupboard is far from bare.
If everyone fully recovers from last season's injuries, the defense should be in good shape. Presumptive starters Mark Gilbert, Edgar Cerenord and Dylan Singleton are key guys who were lost for the season last year.