Bad time to be a top back
Decreasing demand on the position will likely limit Richardson's long-term value
Trent Richardson enters the NFL at perhaps the toughest time to be a professional running back.
Whether he goes at No. 4 to the Cleveland Browns or No. 5 to the Tampa Bay Buccaneers, Richardson is the highest-rated running back to enter the league since Darren McFadden in 2008, Adrian Peterson in 2007 and Reggie Bush in 2006.
What's amazing is how quickly the game has changed for running backs. When Bush entered the NFL, 19 backs averaged 17 or more carries ...
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