So we've all heard about the rule changes by now, (and if you haven't, go watch Brandon Perna's awesome video about it) and the one that should interest Bronco fans in particular is the rule banning all chop blocks.
Now, before we dig into the implications of this rule, let's establish what we're talking about here. A chop block is when a defender is engaged with a blocker, and a second blocker hits him below the waist. These used to be illegal on all pass plays, but legal on some running plays.