The NFL is starting to understand the prototypical RB size from the year 2000 may not necessarily be ideal in today's NFL. There are many reasons why players who may not have succeeded 25 years ago at running back might just be the new prototype in today's NFL. Reasons include new rules, amended rules, faster linebackers, faster safeties, faster defensive ends, running back by committee across the board, lower running back salaries, defensive philosophy, offensive philosophy, defensive philosophy and base sets, and the list goes on. The NFL is changing their thinking, so should you.