Mike Shanahan: RG3 and Snyder don’t realize the work it takes to become a pocket passer

Mike Shanahan coached Robert Griffin III to a rookie of the year-winning season in 2012, and then coached Griffin during a disastrous season in 2013. Shanahan says the reason Griffin’s career went south is that Griffin and owner Dan Snyder decided that Griffin should be a pocket passer, without considering how hard it would be…