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Who is the best player in the NFL this season? That answer might be more complicated than you think.

Everyone thinks they know who the best player is, but what if you take away previous success, ignore future potential and look solely at this season's production and impact? Is Peyton Manning still having an MVP-caliber season if you remove his past success? How about Tom Brady?

At the halfway point of the season, we're updating our Top 50 players list. And remember, this is based only on the first eight weeks of the 2013 season.

All stats are courtesy of Pro Football Focus.