Perhaps the biggest story of the NFL offseason has been star running backs trying – and failing – to get the big contracts they feel they deserve. That, plus the ever-shortening careers of running backs, has led some people to declare that we have reached the end of the NFL's star running back era. Today, a look at how we got here and what the changes we’re seeing in football could mean for the future of the sport.

Guest: Joe Rexrode, The Athletic

Read Joe's story about Derrick Henry and the future of running backs

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