Than luckily you aren't on the coaching staff. There is a huge difference between a great running back from a good running back and another gap between a decent running back. Oline is a huge part of it but it depends on the blocking scheme as well. If you are running zone blocking and you have a RB with no vision to find the gaps you aren't gonna do very well. Davis and Ropati have terrible vision hence why the don't break of chunks like LJ does. Tyler Allgeier had excellent vision and that's why he was so successful. It seems to me we have a stable of RBs who just want a designated hole to hit and that is not gonna get you very many chunk yardage runs.