Rice never got down field this year to need a block. He was constantly getting hit behind the line. What people didn't realize is how big a loss Matt Birk was, how bad Juan Castillo would screw up the line by changing schemes, how Bryant McKinnie would quit on the team and how Osemele would get hurt.
Way down the list on factors influencing the run game is Boldin and only when combined with the loss of Pitta for much of the year.
If you want to evaluate Rice for next year, look at offseason changes impacting the OL - in coaching, draft and FA.
