The offensive line was bad. I don't think anyone is going to argue that. The production did take a turn for the worse after Harris got hurt though. Even if you don't count the Central Connecticut game, Miami was a much better rushing team with Harris than with Knighton as the main back. There was a thread here not too long ago discussing the drop-off. The main problem was that with such a poor run blocking line,
Harris was able to take better advantage of the occasional hole they would open up whereas Knighton too often looked for contact. I don't remember who it was that had the video evidence and/or numbers but it might have been
@DMoney. With a poor run blocking line, you need to get as many chunk plays as possible when the opportunity arises but Chaney would too often run himself right into a defender after 5 yards.
I think with a renewed focus on run blocking and a stable of healthy backs, Miami should be able to get back to being a solid, if not great running team this year. With a bit more consistency, it wouldn't be unimaginable to see them crack the 160-170 yards per game mark. That would take a lot of the pressure off the passing game.