There are basically two ways to move the football: by creating numbers advantages with tactics — 2 - on - 1 situations, 3 - on - 2s, etc. — or by simply having your guy beat the defense in a 1 - on - 1. (sbnation.com)
But there are so many components to running that, lots of blocking schemes and varying your formations to gain numbers advantages.» (sbnation.com)
It's hard to outnumber the run and create numbers advantages if the offense is isolating your players by attacking their assignments. (sbnation.com)