Is Unga an NFL-caliber Running Back

I'm not sure he is.

Not as a feature back, but as a 3rd down back for sure. Good enough blocker and pass catcher, so I think he sticks with someone for sure.

Yes. Not a super star. I'll bet he's as fast as Jerome Bettis was - and Harvey has better hip movement. He will make some team a fine Fullback. Austin Colley had his doubters too.

I just looked their 40 yd. times up. Jerome Bettis 4.50. Harvey Unga 4.52. Pretty close times. I think Harvey will do fine.