its all scheme, and its all in finding a very good fullback, like a Neal or like a Moose johnson or like a Griffith..... if you have a decent fullback or even a solid one, it isn't the same as having a GREAT one.
otherwise it's the offensive line.... Dallas with Emmit smith (maybe one of the bestest ever, and throw Moose in with them (WOW).... Denver Broncos zone blocking scheme, even with or without Griffith, yummy. When Green Bay could run very well like 10 years ago, great offensive line.... then add Chicago of the late 80's.... then add Detroit with Barry Sanders (and then you say, wait... that line was horrid.... and thy you look and see how amazing Barry sanders actually was, with not that great passing attack taboot.... Barry Sanders, wow)...... NOW, add Miami Dolphins of '09 to that list, a young and aggressive line that will open gaping holes for our 3 RB's and Plite with goalline opportunities, a line that shall destroy all and guide miami into the superbowl and give glory to fans that thought they would pass away before miami would ever win the lombardi.... it starts in the trenches!!!!! the FB needs the space and opportunity to move around himself ad get to the defense