'Running backs are also among the most fungible players in any sport. They have been devalued in recent seasons — last year, no running backs were taken in the first 50 picks of the draft. It is not prudent for a team to carry a running back — any running back — making McCoy’s $10.2 million, more than seven percent of the salary cap for one player at a position that is inherently replaceable and health-averse.'