The stats are so awful this season vs low level competition that there are only a few possibilities- undisclosed bumps and bruises, bad OL play (but Allen is doing well), or he has made a biz decision to only go full speed in the big games. It is obvious he is doing poorly and when you see his performance measured in yards after contact it really makes you wonder what is actually wrong with him.
When we evaluate the value of a running back, it'd be fair to say we're looking for the following attributes:
-acceleration/running speed
-agility/elusiveness
-power/tackle breaking
-field vision/ability to find seams, holes, lanes
-hands/route running in passing situations
When I look at Singleton, I have seen him be effective as a passing target coming out of the backfield. But everything else...? I don't know what to tell you.
People like to say he's fast, but he was tracked down from behind by a defensive end that plays for an FCS team. I certainly haven't seen any burst from him this year. I think he just has the reputation of being fast because that was the narrative when he came into the program. But when you go looking for evidence...? Not seeing it.
I've never seen elusiveness from him at all. He has no moves. He never spins. He doesn't move laterally, doesn't juke. I would say his agility is below average.
As far as power/tackle breaking ability, at best, we've seen this here and there, but not with any consistency to make anyone think he's Barkley or Ki-Jana.
His field vision is absurd in how nonexistent it is. He cannot find openings to save his life. Against FIU, he missed a hole the side of the Grand Canyon and ran directly into his own blockers.
You might be right-- he may have decided, "I'm going at 50% against these OOC teams, and I don't care what the stat sheet says." That's kind of hard to believe... but I suppose it could be true. People who make it this level like to compete. If you don't, you would've have made it this far. I think he's just not that good.
The other thing is: another poster pointed out that Nick is playing to try to solidify a good draft position. So it makes no sense to phone it in. He should be out there look to peel off 40 yard runs every time he touches the ball. /shrug