Huge bummer. I was really looking forward to seeing what he could do this year. It's not like I'm super worried about the offense without him, since we've got plenty of athletic guys in the program now, but I was really expecting him to pop this year.
Looks like somebody is going to have pull a KeiVarae Russell and come out of nowhere to seize that spot this year. My money is on Onwualu, actually.
I've heard a few times that Onwualu has been impressive, so this is where my money is as well. A lot of people have mentioned TJ to slot, but he's played outside since he's been at ND, with the ocassional formation package switching things up. But with how TJ progressed on the outside last year and the way he seems to be truly establishing himself as a possession receiver (despite his size), I say leave TJ where he is and give the young guns a shot in the slot.
If the offense opens up how I think it will under Golson, there will be plenty of reps to sort it out, including trying Brown in the slot and blowing the lid off the defense via the seam. Also, Onwualu was primarily in the backfield most of his career in HS, so he should fit nicely in the slot/hybrid role with his athleticism, ball skills, and EE status.
I don't necesarily like Brown to slot either, considering his speed and physical development, but SPEED ON THE FIELD.