The NFL always has it's fair share of rookies who make an impact on their respective teams, but there are always more gems to be found by digging deeper into rosters.
Most of these guys are diamonds in the rough who are beginning to become more proficient for their respective teams, whereas others had some sort of limited expectations coming into 2013.
You also have players like Jordan Reed who were drafted to take over the starting position down the road, but have managed to beat the learning curve and contribute right away.
There are tons of guys to choose from, but these six stand out among the rest.
*All stats courtesy of Pro Football Reference*