There is no mystery in Flacco's numbers. He had a nice run for one Super Bowl but his main body of work speaks more of mediocrity . Flacco's career QB rating is 84.1. Even for the 2012 season when the Ravens won the Super Bowl, he only had an 87.7 rating. That is not very good at all in a league where elite QBs have ratings hovering in the high 90s to low 100s. There is no switch that will magically turn on.