Reading many, many posts on how EJ is "gonna use his legs more," and "EJ was coached up not to run in 2014," I decided to do a little digging. Not to exonerate Marrone, but to just see if these claims were accurate.
On the surface, they appear to be.
2013 - 5.3 RAPG
2014 - 4 RAPG (The Jets game was not included, due to EJ handing it off 3 times to close out the game.)
But let's dig a little deeper. Besides the Houston game, EJ in 2014 would've average 5 RAPG. Houston appears to be one outlier game where he rushed 1 time, probably because of JJ Watt chasing him down. Looking at 2013, he also had an outlier game of only 1 rush, against Cleveland. So, it's not unlike EJ 2013, or 2014 version, to only have one rush in a game.
Throwing out both low outliers.
2013 - 5.8 RAPG
2014 - 5 RAPG
Significant? You be the judge.