In case you forgot what QBR is all about, here's a link describing the methodology behind the rating (they also noted several subsequent tweaks here). The scale is 0-100, with average being 50; the best performers tend to be around 75-80 for a full season (Aaron Rodgers set the record with 86.2 last year), while something like the 11.7 that JaMarcus Russell put up in 2009 would be considered the bottom of the barrel.
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