That doesn't mean Butcher can't do like Vereen did as a freshman and find a niche. Plus injuries happen.
I never said he'll be #2. Just that I could see him working himself onto the field perhaps as a specialty rusher or something.
Edit: if you remember, that's basically how Vereen was used as a freshman. They'd put him in occasionally on in obvious pass rushing situations and unleash him. I wouldn't be surprised to see Butcher have some sort of similar role. He gets after it coming off the edge.