As the 2012 NFL season progresses, it will be easy to tell how rookies like Robert Griffin III, Andrew Luck and Trent Richardson are doing. All you'll have to do is glance at the stats and see how they measure up against the rest of the league.
However, there will be a number of rookies who have huge impacts this year by doing things that won't show up in the box score.
Fans can check a box score to see how many tackles a player had, how many receptions he hauled in or if he corralled any interceptions.
But there are so many other things that players do on a play-to-play basis that aren't really recognized until film breakdown the next day.
Things like defensive tackles occupying blockers, cornerbacks holding their coverage for an extended amount of time or downfiield blocking by receivers are all little things that don't show up in the box score, but are essential to team success.
Here's a look at six rookies whose impacts will be felt beyond any statistics they put up in the box score.