An NFL career ends in different ways. Players become too old, too broken down, too expensive or just not good enough anymore.
They’re often shoved into retirement as teams find the next man for the job.
John Carlson unexpectedly left the game on his own volition.
He walked away from a secure roster spot in Arizona, a $1 million salary and a situation he loved.
He felt healthy and had no concussion symptoms at the time.