If a guy wants to play and can help the team, then play him.
Dennard "wasted" his freshman year largely being the #2 option on kick returns.
We need something more out of this position group. If the guy isn't Wilbon or Taylor, then don't give the next chance to them out of seniority.
I like that Riley is looking for options at RB. If Stevenson can make an impact, then great, put him on the field and USE him.
You guys hit the two key points in my opinion.
If he "wants" to play, and you can use him, then you play him. BUT please for the love of all that is holy, you'd better USE him then. Don't waste a season of this guy's career.
Like Saunders said, if he comes in to return kicks, then what's the harm in giving him a few carries in the backfield? Maybe Ozigbo and Stevenson carry this run game to new levels. That'd be freaking fun to watch in my opinion.