Understanding Total QBR

Updated: August 29, 2013, 9:44 PM ET
By Dean Oliver | ESPN.com

Johnny Manziel ranked 16th in 2012 in NCAA passer efficiency with a value of 155.3. When Manziel won the 2012 Heisman Trophy as the best college football player, no one cited his passer efficiency to support it. Manziel's value came from more than his ability to throw the ball, which is what passer efficiency attempts to capture. Manziel led Texas A&M to 11 wins by running, avoiding the pass rush, taking care of the ball and moving the chains. The A&M system brought out the best features in Manziel, ...

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