Welcome to The Playcallers - a five-part podcast series that explores the innovation, competition and sometimes even self-destruction inside the N.F.L.’s youngest coaching family.In Episode 1, host Jourdan Rodrigue details the origins of the ShanahanMcVay offensive system, which over time grew into the most popular in the sport. Unique circumstances push Kyle Shanahan to start to evolve this system as he joins up with other young coaches in Tampa Bay, Houston and Washington. A collision of forces, dysfunction and talent culminates in the offensive explosion (and then implosion) in Washington with rookie quarterback Robert Griffin the Third.Voices in the episode include Kyle Shanahan, Sean McVay, Mike McDaniel, Matt LaFleur, Raheem Morris and Robert Griffin the Third.